/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/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:15:48,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:15:48,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:15:48,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 21:15:48,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 21:15:48,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 21:15:48,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 21:15:48,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 21:15:48,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 21:15:48,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 21:15:48,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 21:15:48,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 21:15:48,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 21:15:48,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 21:15:48,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 21:15:48,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 21:15:48,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 21:15:48,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 21:15:48,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 21:15:48,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 21:15:48,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 21:15:48,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 21:15:48,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 21:15:48,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 21:15:48,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-15 21:15:48,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:15:48,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:15:48,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:15:48,592 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 21:15:48,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:15:48,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:15:48,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:15:48,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:15:48,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:15:48,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:15:48,616 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:15:48,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:15:48,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:15:48,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:15:48,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:15:48,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:15:48,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:15:48,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:15:48,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:15:48,617 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:15:48,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:15:48,617 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:15:48,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:15:48,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:15:48,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:15:48,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:15:48,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:15:48,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:15:48,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:15:48,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:15:48,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:15:48,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:15:48,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:15:48,620 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:15:48,620 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:15:48,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:15:48,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:15:48,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:15:48,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:15:48,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:15:48,833 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:15:48,833 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:15:48,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2022-03-15 21:15:48,834 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2022-03-15 21:15:48,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:15:48,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:15:48,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:15:48,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:15:48,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:15:48,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,872 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:15:48,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:15:48,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:15:48,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:15:48,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:15:48,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:15:48,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:15:48,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:15:48,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:15:48,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/1) ... [2022-03-15 21:15:48,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:15:48,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:48,918 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 21:15:48,941 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 21:15:48,949 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:15:48,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:15:48,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:15:48,950 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:15:48,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:15:48,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:15:48,950 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:15:48,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:15:48,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:15:48,951 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 21:15:48,983 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:15:48,985 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:15:49,052 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:15:49,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:15:49,056 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:15:49,057 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:15:49 BoogieIcfgContainer [2022-03-15 21:15:49,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:15:49,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:15:49,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:15:49,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:15:49,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:15:48" (1/2) ... [2022-03-15 21:15:49,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e2c479 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:15:49, skipping insertion in model container [2022-03-15 21:15:49,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:15:49" (2/2) ... [2022-03-15 21:15:49,062 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2022-03-15 21:15:49,066 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:15:49,066 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:15:49,066 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:15:49,066 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:15:49,089 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 21:15:49,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:15:49,127 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 21:15:49,127 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 21:15:49,135 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:15:49,145 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 29 transitions, 74 flow [2022-03-15 21:15:49,147 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 29 transitions, 74 flow [2022-03-15 21:15:49,148 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 74 flow [2022-03-15 21:15:49,162 INFO L129 PetriNetUnfolder]: 4/27 cut-off events. [2022-03-15 21:15:49,162 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 21:15:49,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 56 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2022-03-15 21:15:49,165 INFO L116 LiptonReduction]: Number of co-enabled transitions 198 [2022-03-15 21:15:49,772 INFO L131 LiptonReduction]: Checked pairs total: 222 [2022-03-15 21:15:49,772 INFO L133 LiptonReduction]: Total number of compositions: 21 [2022-03-15 21:15:49,784 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 42 flow [2022-03-15 21:15:49,798 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 21:15:49,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:49,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:49,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:49,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash -171426348, now seen corresponding path program 1 times [2022-03-15 21:15:49,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:49,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582251118] [2022-03-15 21:15:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:49,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:49,904 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 21:15:49,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:49,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582251118] [2022-03-15 21:15:49,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582251118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:15:49,906 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:15:49,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 21:15:49,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2079839222] [2022-03-15 21:15:49,908 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:49,912 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:49,928 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 21:15:49,928 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:50,006 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:15:50,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:15:50,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:15:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:15:50,028 INFO L87 Difference]: Start difference. First operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:50,048 INFO L93 Difference]: Finished difference Result 21 states and 37 transitions. [2022-03-15 21:15:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:15:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-03-15 21:15:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:50,055 INFO L225 Difference]: With dead ends: 21 [2022-03-15 21:15:50,055 INFO L226 Difference]: Without dead ends: 18 [2022-03-15 21:15:50,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:15:50,061 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:50,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:15:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-15 21:15:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-15 21:15:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. 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 21:15:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2022-03-15 21:15:50,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 8 [2022-03-15 21:15:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:50,081 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2022-03-15 21:15:50,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2022-03-15 21:15:50,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 21:15:50,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:50,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:50,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:15:50,082 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1006082920, now seen corresponding path program 1 times [2022-03-15 21:15:50,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:50,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383067441] [2022-03-15 21:15:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:50,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:50,106 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 21:15:50,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:50,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383067441] [2022-03-15 21:15:50,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383067441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:15:50,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:15:50,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:15:50,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1328663118] [2022-03-15 21:15:50,107 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:50,108 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:50,109 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 21:15:50,109 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:50,199 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [124#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 123#(< i2 (* 2 N)), 126#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 125#(< i1 (* 2 N))] [2022-03-15 21:15:50,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:15:50,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:15:50,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:15:50,201 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:15:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:50,319 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2022-03-15 21:15:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:15:50,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 9 [2022-03-15 21:15:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:50,321 INFO L225 Difference]: With dead ends: 39 [2022-03-15 21:15:50,322 INFO L226 Difference]: Without dead ends: 36 [2022-03-15 21:15:50,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:15:50,337 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 38 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:50,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-15 21:15:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-03-15 21:15:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. 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 21:15:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 57 transitions. [2022-03-15 21:15:50,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 57 transitions. Word has length 9 [2022-03-15 21:15:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:50,342 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 57 transitions. [2022-03-15 21:15:50,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:15:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 57 transitions. [2022-03-15 21:15:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 21:15:50,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:50,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:50,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:15:50,343 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:50,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1034416509, now seen corresponding path program 1 times [2022-03-15 21:15:50,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:50,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391394793] [2022-03-15 21:15:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:50,378 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 21:15:50,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:50,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391394793] [2022-03-15 21:15:50,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391394793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:15:50,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:15:50,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:15:50,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [599871664] [2022-03-15 21:15:50,379 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:50,379 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:50,381 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 21:15:50,381 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:50,402 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [240#(< i2 (* 2 N))] [2022-03-15 21:15:50,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:15:50,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:50,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:15:50,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:15:50,404 INFO L87 Difference]: Start difference. First operand 28 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:50,458 INFO L93 Difference]: Finished difference Result 37 states and 62 transitions. [2022-03-15 21:15:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:15:50,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-15 21:15:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:50,458 INFO L225 Difference]: With dead ends: 37 [2022-03-15 21:15:50,459 INFO L226 Difference]: Without dead ends: 33 [2022-03-15 21:15:50,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:15:50,460 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:50,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 1 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:15:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-15 21:15:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2022-03-15 21:15:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2022-03-15 21:15:50,463 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 9 [2022-03-15 21:15:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:50,464 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2022-03-15 21:15:50,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2022-03-15 21:15:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:15:50,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:50,464 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:50,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 21:15:50,465 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1866191427, now seen corresponding path program 1 times [2022-03-15 21:15:50,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:50,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935019407] [2022-03-15 21:15:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:50,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:50,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:50,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935019407] [2022-03-15 21:15:50,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935019407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:50,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259653848] [2022-03-15 21:15:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:50,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:50,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:50,502 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 21:15:50,503 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 21:15:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:50,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 21:15:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:50,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:50,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259653848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:50,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:50,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-15 21:15:50,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015562989] [2022-03-15 21:15:50,723 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:50,724 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:50,725 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 17 transitions. [2022-03-15 21:15:50,725 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:50,755 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [403#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 402#(< i2 (* 2 N))] [2022-03-15 21:15:50,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:15:50,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:50,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:15:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:15:50,757 INFO L87 Difference]: Start difference. First operand 25 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 21:15:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:50,831 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2022-03-15 21:15:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:15:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 11 [2022-03-15 21:15:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:50,835 INFO L225 Difference]: With dead ends: 57 [2022-03-15 21:15:50,836 INFO L226 Difference]: Without dead ends: 57 [2022-03-15 21:15:50,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:15:50,837 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:50,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-15 21:15:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2022-03-15 21:15:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 65 transitions. [2022-03-15 21:15:50,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 65 transitions. Word has length 11 [2022-03-15 21:15:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:50,841 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 65 transitions. [2022-03-15 21:15:50,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 21:15:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 65 transitions. [2022-03-15 21:15:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:15:50,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:50,842 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:50,861 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 21:15:51,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:51,043 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:51,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1008210627, now seen corresponding path program 2 times [2022-03-15 21:15:51,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:51,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443498377] [2022-03-15 21:15:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:51,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:51,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:51,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443498377] [2022-03-15 21:15:51,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443498377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:51,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288348321] [2022-03-15 21:15:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:15:51,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:51,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:51,116 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 21:15:51,117 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 21:15:51,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:15:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 21:15:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:51,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:51,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288348321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:51,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:51,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 7 [2022-03-15 21:15:51,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [852601152] [2022-03-15 21:15:51,254 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:51,255 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:51,257 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2022-03-15 21:15:51,257 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:51,311 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [599#(< i1 (* 2 N)), 601#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 600#(< i2 (* 2 N))] [2022-03-15 21:15:51,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:15:51,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:15:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:15:51,312 INFO L87 Difference]: Start difference. First operand 32 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:15:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:51,406 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2022-03-15 21:15:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:15:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 11 [2022-03-15 21:15:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:51,407 INFO L225 Difference]: With dead ends: 41 [2022-03-15 21:15:51,407 INFO L226 Difference]: Without dead ends: 41 [2022-03-15 21:15:51,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:15:51,411 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:51,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:15:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-15 21:15:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-15 21:15:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 67 transitions. [2022-03-15 21:15:51,416 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 67 transitions. Word has length 11 [2022-03-15 21:15:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:51,417 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 67 transitions. [2022-03-15 21:15:51,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:15:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 67 transitions. [2022-03-15 21:15:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:15:51,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:51,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:51,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 21:15:51,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:51,636 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:51,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2028708710, now seen corresponding path program 3 times [2022-03-15 21:15:51,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:51,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298570392] [2022-03-15 21:15:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:51,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:15:51,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:51,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298570392] [2022-03-15 21:15:51,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298570392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:51,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279033199] [2022-03-15 21:15:51,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:15:51,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:51,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:51,790 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 21:15:51,791 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 21:15:51,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 21:15:51,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:51,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:15:51,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:15:52,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:15:52,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279033199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:52,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:52,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-15 21:15:52,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1122729212] [2022-03-15 21:15:52,176 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:52,177 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:52,178 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2022-03-15 21:15:52,178 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:52,281 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:15:52,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:15:52,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:52,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:15:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:15:52,281 INFO L87 Difference]: Start difference. First operand 34 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:52,321 INFO L93 Difference]: Finished difference Result 71 states and 136 transitions. [2022-03-15 21:15:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:15:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:15:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:52,322 INFO L225 Difference]: With dead ends: 71 [2022-03-15 21:15:52,322 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 21:15:52,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:15:52,324 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:52,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:15:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 21:15:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2022-03-15 21:15:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 117 transitions. [2022-03-15 21:15:52,340 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 117 transitions. Word has length 12 [2022-03-15 21:15:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:52,341 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 117 transitions. [2022-03-15 21:15:52,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 117 transitions. [2022-03-15 21:15:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:15:52,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:52,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:52,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 21:15:52,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:52,558 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash -546130942, now seen corresponding path program 4 times [2022-03-15 21:15:52,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:52,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169365611] [2022-03-15 21:15:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:52,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:52,697 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 21:15:52,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:52,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169365611] [2022-03-15 21:15:52,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169365611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:52,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060582974] [2022-03-15 21:15:52,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:15:52,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:52,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:52,700 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 21:15:52,701 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 21:15:52,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:15:52,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:52,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:15:52,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:52,923 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 21:15:52,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:53,153 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 21:15:53,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060582974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:53,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:53,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-15 21:15:53,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [520104501] [2022-03-15 21:15:53,156 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:53,156 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:53,158 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 18 transitions. [2022-03-15 21:15:53,158 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:53,193 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:15:53,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:15:53,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:15:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:15:53,195 INFO L87 Difference]: Start difference. First operand 56 states and 117 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:53,257 INFO L93 Difference]: Finished difference Result 107 states and 221 transitions. [2022-03-15 21:15:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:15:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:15:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:53,258 INFO L225 Difference]: With dead ends: 107 [2022-03-15 21:15:53,258 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 21:15:53,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:15:53,259 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 15 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:53,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 21:15:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2022-03-15 21:15:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 63 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 143 transitions. [2022-03-15 21:15:53,275 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 143 transitions. Word has length 12 [2022-03-15 21:15:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:53,276 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 143 transitions. [2022-03-15 21:15:53,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 143 transitions. [2022-03-15 21:15:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:53,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:53,276 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:53,294 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 21:15:53,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:53,494 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:53,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:53,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1546295160, now seen corresponding path program 5 times [2022-03-15 21:15:53,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:53,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581039221] [2022-03-15 21:15:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:53,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:53,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:53,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581039221] [2022-03-15 21:15:53,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581039221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:53,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826358050] [2022-03-15 21:15:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:15:53,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:53,543 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 21:15:53,544 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 21:15:53,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:15:53,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:53,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:53,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826358050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:53,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:53,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 21:15:53,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1812451576] [2022-03-15 21:15:53,665 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:53,665 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:53,666 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:15:53,667 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:53,714 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1367#(< i2 (* 2 N)), 1368#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1369#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:15:53,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:15:53,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:15:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:15:53,715 INFO L87 Difference]: Start difference. First operand 64 states and 143 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:53,804 INFO L93 Difference]: Finished difference Result 165 states and 340 transitions. [2022-03-15 21:15:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:15:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:15:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:53,805 INFO L225 Difference]: With dead ends: 165 [2022-03-15 21:15:53,805 INFO L226 Difference]: Without dead ends: 165 [2022-03-15 21:15:53,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:15:53,806 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:53,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:53,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-15 21:15:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 80. [2022-03-15 21:15:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.392405063291139) internal successors, (189), 79 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 189 transitions. [2022-03-15 21:15:53,809 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 189 transitions. Word has length 13 [2022-03-15 21:15:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:53,809 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 189 transitions. [2022-03-15 21:15:53,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 189 transitions. [2022-03-15 21:15:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:53,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:53,810 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:53,830 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 21:15:54,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:54,026 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1523190109, now seen corresponding path program 6 times [2022-03-15 21:15:54,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:54,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408945971] [2022-03-15 21:15:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:54,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:54,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408945971] [2022-03-15 21:15:54,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408945971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:54,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330193514] [2022-03-15 21:15:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:15:54,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:54,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:54,064 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 21:15:54,065 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 21:15:54,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:15:54,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:54,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:54,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:54,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330193514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:54,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:54,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 21:15:54,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1463487254] [2022-03-15 21:15:54,151 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:54,152 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:54,153 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:15:54,153 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:54,204 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1789#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1790#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1788#(< i2 (* 2 N))] [2022-03-15 21:15:54,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:15:54,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:15:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:15:54,205 INFO L87 Difference]: Start difference. First operand 80 states and 189 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 21:15:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:54,297 INFO L93 Difference]: Finished difference Result 165 states and 370 transitions. [2022-03-15 21:15:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:15:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:15:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:54,298 INFO L225 Difference]: With dead ends: 165 [2022-03-15 21:15:54,298 INFO L226 Difference]: Without dead ends: 162 [2022-03-15 21:15:54,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:15:54,299 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:54,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:15:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-15 21:15:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 108. [2022-03-15 21:15:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.542056074766355) internal successors, (272), 107 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 272 transitions. [2022-03-15 21:15:54,303 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 272 transitions. Word has length 13 [2022-03-15 21:15:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:54,303 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 272 transitions. [2022-03-15 21:15:54,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 21:15:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 272 transitions. [2022-03-15 21:15:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:54,304 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:54,304 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:54,322 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 21:15:54,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:54,520 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:54,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:54,520 INFO L85 PathProgramCache]: Analyzing trace with hash -684148316, now seen corresponding path program 7 times [2022-03-15 21:15:54,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:54,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580560412] [2022-03-15 21:15:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:54,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:54,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580560412] [2022-03-15 21:15:54,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580560412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:54,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017149313] [2022-03-15 21:15:54,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:15:54,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:54,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:54,550 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 21:15:54,563 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 21:15:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:54,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:54,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:54,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:54,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017149313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:54,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:54,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-15 21:15:54,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [350427098] [2022-03-15 21:15:54,673 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:54,674 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:54,675 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:15:54,675 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:54,706 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2269#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 2268#(< i2 (* 2 N)), 2270#(< i1 (* 2 N))] [2022-03-15 21:15:54,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:15:54,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:54,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:15:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:15:54,707 INFO L87 Difference]: Start difference. First operand 108 states and 272 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:15:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:54,831 INFO L93 Difference]: Finished difference Result 150 states and 334 transitions. [2022-03-15 21:15:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:15:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:15:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:54,833 INFO L225 Difference]: With dead ends: 150 [2022-03-15 21:15:54,833 INFO L226 Difference]: Without dead ends: 148 [2022-03-15 21:15:54,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:15:54,833 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:54,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-15 21:15:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2022-03-15 21:15:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.5) internal successors, (250), 100 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 250 transitions. [2022-03-15 21:15:54,836 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 250 transitions. Word has length 13 [2022-03-15 21:15:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:54,837 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 250 transitions. [2022-03-15 21:15:54,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:15:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 250 transitions. [2022-03-15 21:15:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:54,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:54,837 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:54,866 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 21:15:55,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:55,067 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1924878008, now seen corresponding path program 8 times [2022-03-15 21:15:55,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:55,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343913936] [2022-03-15 21:15:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:15:55,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:55,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343913936] [2022-03-15 21:15:55,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343913936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:55,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848316354] [2022-03-15 21:15:55,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:15:55,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:55,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:55,097 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 21:15:55,098 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 21:15:55,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:15:55,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:55,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:55,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:15:55,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:15:55,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848316354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:55,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:55,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-15 21:15:55,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1181323467] [2022-03-15 21:15:55,213 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:55,214 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:55,215 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2022-03-15 21:15:55,215 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:55,280 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2724#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 2725#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 2723#(< i2 (* 2 N))] [2022-03-15 21:15:55,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:15:55,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:15:55,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:15:55,281 INFO L87 Difference]: Start difference. First operand 101 states and 250 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 21:15:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:55,485 INFO L93 Difference]: Finished difference Result 210 states and 466 transitions. [2022-03-15 21:15:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:15:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 13 [2022-03-15 21:15:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:55,486 INFO L225 Difference]: With dead ends: 210 [2022-03-15 21:15:55,486 INFO L226 Difference]: Without dead ends: 210 [2022-03-15 21:15:55,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:15:55,487 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:55,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-15 21:15:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 135. [2022-03-15 21:15:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.6194029850746268) internal successors, (351), 134 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 351 transitions. [2022-03-15 21:15:55,491 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 351 transitions. Word has length 13 [2022-03-15 21:15:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:55,491 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 351 transitions. [2022-03-15 21:15:55,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 21:15:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 351 transitions. [2022-03-15 21:15:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:55,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:55,492 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:55,525 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 21:15:55,708 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,SelfDestructingSolverStorable10 [2022-03-15 21:15:55,709 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1981286947, now seen corresponding path program 9 times [2022-03-15 21:15:55,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:55,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483309237] [2022-03-15 21:15:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:15:55,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:55,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483309237] [2022-03-15 21:15:55,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483309237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:55,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11702087] [2022-03-15 21:15:55,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:15:55,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:55,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:55,751 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 21:15:55,752 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 21:15:55,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:15:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:15:55,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:15:55,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11702087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:55,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:55,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-15 21:15:55,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319509910] [2022-03-15 21:15:55,854 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:55,854 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:55,855 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 19 transitions. [2022-03-15 21:15:55,855 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:55,869 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3314#(< i2 (* 2 N))] [2022-03-15 21:15:55,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:15:55,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:15:55,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:15:55,870 INFO L87 Difference]: Start difference. First operand 135 states and 351 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:55,938 INFO L93 Difference]: Finished difference Result 213 states and 494 transitions. [2022-03-15 21:15:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:15:55,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:15:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:55,939 INFO L225 Difference]: With dead ends: 213 [2022-03-15 21:15:55,939 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 21:15:55,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:15:55,940 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:55,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:15:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 21:15:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2022-03-15 21:15:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.673611111111111) internal successors, (385), 144 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 385 transitions. [2022-03-15 21:15:55,944 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 385 transitions. Word has length 13 [2022-03-15 21:15:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:55,944 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 385 transitions. [2022-03-15 21:15:55,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 385 transitions. [2022-03-15 21:15:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:55,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:55,945 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:55,977 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 21:15:56,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:56,145 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:56,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1482585607, now seen corresponding path program 10 times [2022-03-15 21:15:56,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:56,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716183080] [2022-03-15 21:15:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:56,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:56,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:56,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716183080] [2022-03-15 21:15:56,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716183080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:56,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161016575] [2022-03-15 21:15:56,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:15:56,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:56,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:56,184 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 21:15:56,185 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 21:15:56,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:15:56,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:56,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:56,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:56,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:56,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161016575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:56,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:56,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-15 21:15:56,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [202512384] [2022-03-15 21:15:56,317 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:56,318 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:56,319 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:15:56,319 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:56,362 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3909#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:15:56,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:15:56,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:56,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:15:56,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:15:56,362 INFO L87 Difference]: Start difference. First operand 145 states and 385 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:15:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:56,481 INFO L93 Difference]: Finished difference Result 229 states and 525 transitions. [2022-03-15 21:15:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:15:56,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 13 [2022-03-15 21:15:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:56,482 INFO L225 Difference]: With dead ends: 229 [2022-03-15 21:15:56,482 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 21:15:56,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:15:56,483 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:56,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 21:15:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 147. [2022-03-15 21:15:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.6780821917808217) internal successors, (391), 146 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 391 transitions. [2022-03-15 21:15:56,487 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 391 transitions. Word has length 13 [2022-03-15 21:15:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:56,488 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 391 transitions. [2022-03-15 21:15:56,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 21:15:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 391 transitions. [2022-03-15 21:15:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:56,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:56,488 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:56,521 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 21:15:56,704 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,SelfDestructingSolverStorable12 [2022-03-15 21:15:56,704 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2113156324, now seen corresponding path program 11 times [2022-03-15 21:15:56,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:56,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889723446] [2022-03-15 21:15:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:56,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:56,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889723446] [2022-03-15 21:15:56,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889723446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:56,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480650432] [2022-03-15 21:15:56,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:15:56,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:56,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:56,752 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 21:15:56,753 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 21:15:56,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:15:56,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:56,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:56,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:56,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480650432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:56,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:56,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-15 21:15:56,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1485039008] [2022-03-15 21:15:56,895 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:56,896 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:56,897 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:15:56,897 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:56,936 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4528#(< i2 (* 2 N)), 4529#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:15:56,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:15:56,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:56,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:15:56,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:15:56,937 INFO L87 Difference]: Start difference. First operand 147 states and 391 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:57,033 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2022-03-15 21:15:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:15:57,033 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:15:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:57,034 INFO L225 Difference]: With dead ends: 233 [2022-03-15 21:15:57,034 INFO L226 Difference]: Without dead ends: 233 [2022-03-15 21:15:57,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:15:57,034 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:57,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 1 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-15 21:15:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 155. [2022-03-15 21:15:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.6948051948051948) internal successors, (415), 154 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 415 transitions. [2022-03-15 21:15:57,038 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 415 transitions. Word has length 13 [2022-03-15 21:15:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:57,038 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 415 transitions. [2022-03-15 21:15:57,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 415 transitions. [2022-03-15 21:15:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:57,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:57,039 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:57,056 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 21:15:57,254 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,SelfDestructingSolverStorable13 [2022-03-15 21:15:57,255 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1349781655, now seen corresponding path program 12 times [2022-03-15 21:15:57,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:57,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473266531] [2022-03-15 21:15:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:57,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:57,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473266531] [2022-03-15 21:15:57,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473266531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:57,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959709772] [2022-03-15 21:15:57,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:15:57,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:57,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:57,296 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 21:15:57,297 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 21:15:57,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:15:57,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:57,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:57,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:57,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959709772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:57,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:57,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-15 21:15:57,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1912487043] [2022-03-15 21:15:57,391 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:57,392 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:57,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:15:57,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:57,426 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5162#(< i2 (* 2 N)), 5163#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:15:57,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:15:57,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:57,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:15:57,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:15:57,427 INFO L87 Difference]: Start difference. First operand 155 states and 415 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:15:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:57,533 INFO L93 Difference]: Finished difference Result 202 states and 487 transitions. [2022-03-15 21:15:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:15:57,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:15:57,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:57,534 INFO L225 Difference]: With dead ends: 202 [2022-03-15 21:15:57,534 INFO L226 Difference]: Without dead ends: 200 [2022-03-15 21:15:57,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:15:57,537 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:57,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-15 21:15:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 154. [2022-03-15 21:15:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.6993464052287583) internal successors, (413), 153 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 413 transitions. [2022-03-15 21:15:57,540 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 413 transitions. Word has length 13 [2022-03-15 21:15:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:57,540 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 413 transitions. [2022-03-15 21:15:57,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 21:15:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 413 transitions. [2022-03-15 21:15:57,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:57,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:57,541 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:57,560 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 21:15:57,756 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,SelfDestructingSolverStorable14 [2022-03-15 21:15:57,757 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:57,757 INFO L85 PathProgramCache]: Analyzing trace with hash 14445832, now seen corresponding path program 13 times [2022-03-15 21:15:57,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:57,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609055269] [2022-03-15 21:15:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:57,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:57,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:57,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609055269] [2022-03-15 21:15:57,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609055269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:57,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403187215] [2022-03-15 21:15:57,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:15:57,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:57,797 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 21:15:57,811 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 21:15:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:57,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:57,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403187215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:57,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:57,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-15 21:15:57,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [919439855] [2022-03-15 21:15:57,946 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:57,947 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:57,948 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2022-03-15 21:15:57,948 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:58,088 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [5766#(< i2 (* 2 N)), 5767#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 5768#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 5769#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:15:58,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:15:58,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:15:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:15:58,089 INFO L87 Difference]: Start difference. First operand 154 states and 413 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:58,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:58,555 INFO L93 Difference]: Finished difference Result 514 states and 1145 transitions. [2022-03-15 21:15:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:15:58,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:15:58,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:58,558 INFO L225 Difference]: With dead ends: 514 [2022-03-15 21:15:58,558 INFO L226 Difference]: Without dead ends: 510 [2022-03-15 21:15:58,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=453, Invalid=1527, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:15:58,559 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 84 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:58,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:15:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-15 21:15:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 262. [2022-03-15 21:15:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.739463601532567) internal successors, (715), 261 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 715 transitions. [2022-03-15 21:15:58,567 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 715 transitions. Word has length 13 [2022-03-15 21:15:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:58,568 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 715 transitions. [2022-03-15 21:15:58,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 715 transitions. [2022-03-15 21:15:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:58,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:58,568 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:58,586 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 21:15:58,768 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,SelfDestructingSolverStorable15 [2022-03-15 21:15:58,769 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:58,769 INFO L85 PathProgramCache]: Analyzing trace with hash -374356509, now seen corresponding path program 14 times [2022-03-15 21:15:58,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:58,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315494691] [2022-03-15 21:15:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:58,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:58,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:58,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315494691] [2022-03-15 21:15:58,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315494691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:58,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874402573] [2022-03-15 21:15:58,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:15:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:58,794 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 21:15:58,795 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 21:15:58,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:15:58,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:58,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:58,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:58,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874402573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:58,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:58,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-03-15 21:15:58,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [582970348] [2022-03-15 21:15:58,889 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:58,890 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:58,891 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:15:58,891 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:58,913 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6952#(< i2 (* 2 N))] [2022-03-15 21:15:58,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:15:58,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:58,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:15:58,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:15:58,914 INFO L87 Difference]: Start difference. First operand 262 states and 715 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:58,991 INFO L93 Difference]: Finished difference Result 418 states and 1025 transitions. [2022-03-15 21:15:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:15:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:15:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:58,993 INFO L225 Difference]: With dead ends: 418 [2022-03-15 21:15:58,993 INFO L226 Difference]: Without dead ends: 417 [2022-03-15 21:15:58,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:15:58,994 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:58,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:15:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-03-15 21:15:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 286. [2022-03-15 21:15:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.7719298245614037) internal successors, (790), 285 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 790 transitions. [2022-03-15 21:15:59,000 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 790 transitions. Word has length 13 [2022-03-15 21:15:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:59,001 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 790 transitions. [2022-03-15 21:15:59,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 790 transitions. [2022-03-15 21:15:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:59,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:59,001 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:59,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 21:15:59,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:59,234 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:59,234 INFO L85 PathProgramCache]: Analyzing trace with hash -873057849, now seen corresponding path program 15 times [2022-03-15 21:15:59,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:59,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761311342] [2022-03-15 21:15:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:59,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:15:59,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:59,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761311342] [2022-03-15 21:15:59,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761311342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:59,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753003869] [2022-03-15 21:15:59,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:15:59,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:59,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:59,268 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 21:15:59,274 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 21:15:59,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:15:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:15:59,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:59,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753003869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:59,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:59,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-03-15 21:15:59,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [500302157] [2022-03-15 21:15:59,385 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:59,385 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:59,386 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2022-03-15 21:15:59,386 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:15:59,444 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8038#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:15:59,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:15:59,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:15:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:15:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:15:59,445 INFO L87 Difference]: Start difference. First operand 286 states and 790 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 21:15:59,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:15:59,521 INFO L93 Difference]: Finished difference Result 373 states and 920 transitions. [2022-03-15 21:15:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:15:59,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 21:15:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:15:59,523 INFO L225 Difference]: With dead ends: 373 [2022-03-15 21:15:59,523 INFO L226 Difference]: Without dead ends: 373 [2022-03-15 21:15:59,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:15:59,523 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:15:59,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 1 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:15:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-03-15 21:15:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 270. [2022-03-15 21:15:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.7434944237918217) internal successors, (738), 269 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:15:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 738 transitions. [2022-03-15 21:15:59,528 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 738 transitions. Word has length 13 [2022-03-15 21:15:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:15:59,528 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 738 transitions. [2022-03-15 21:15:59,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 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 21:15:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 738 transitions. [2022-03-15 21:15:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:15:59,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:15:59,529 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:15:59,547 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 21:15:59,745 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,SelfDestructingSolverStorable17 [2022-03-15 21:15:59,745 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:15:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:15:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1728364503, now seen corresponding path program 16 times [2022-03-15 21:15:59,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:15:59,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163912979] [2022-03-15 21:15:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:15:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:15:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:15:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:59,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:15:59,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163912979] [2022-03-15 21:15:59,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163912979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:15:59,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526574782] [2022-03-15 21:15:59,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:15:59,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:15:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:15:59,804 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 21:15:59,823 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 21:15:59,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:15:59,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:15:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:15:59,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:15:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:59,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:15:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:15:59,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526574782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:15:59,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:15:59,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 21:15:59,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [930082058] [2022-03-15 21:15:59,927 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:15:59,928 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:15:59,929 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2022-03-15 21:15:59,929 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:00,029 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9045#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9046#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:16:00,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:00,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:00,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:00,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:16:00,030 INFO L87 Difference]: Start difference. First operand 270 states and 738 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:00,152 INFO L93 Difference]: Finished difference Result 404 states and 971 transitions. [2022-03-15 21:16:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:16:00,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 21:16:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:00,153 INFO L225 Difference]: With dead ends: 404 [2022-03-15 21:16:00,154 INFO L226 Difference]: Without dead ends: 404 [2022-03-15 21:16:00,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:00,154 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:00,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-03-15 21:16:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 273. [2022-03-15 21:16:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.7426470588235294) internal successors, (746), 272 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 746 transitions. [2022-03-15 21:16:00,160 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 746 transitions. Word has length 13 [2022-03-15 21:16:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:00,160 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 746 transitions. [2022-03-15 21:16:00,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 746 transitions. [2022-03-15 21:16:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:00,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:00,161 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:00,176 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 21:16:00,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:00,375 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -284042653, now seen corresponding path program 17 times [2022-03-15 21:16:00,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:00,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140787396] [2022-03-15 21:16:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:00,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:00,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140787396] [2022-03-15 21:16:00,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140787396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:00,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137107341] [2022-03-15 21:16:00,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:00,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:00,419 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 21:16:00,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:16:00,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:00,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:16:00,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:00,462 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 21:16:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:00,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:00,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137107341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:00,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:00,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 21:16:00,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [400964200] [2022-03-15 21:16:00,549 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:00,550 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:00,551 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 21:16:00,551 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:00,610 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [10111#(< i2 (* 2 N)), 10114#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 10112#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 10113#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:16:00,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:16:00,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:16:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:00,611 INFO L87 Difference]: Start difference. First operand 273 states and 746 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:00,722 INFO L93 Difference]: Finished difference Result 410 states and 1001 transitions. [2022-03-15 21:16:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:16:00,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 21:16:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:00,724 INFO L225 Difference]: With dead ends: 410 [2022-03-15 21:16:00,724 INFO L226 Difference]: Without dead ends: 410 [2022-03-15 21:16:00,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:00,725 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:00,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-15 21:16:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 287. [2022-03-15 21:16:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.7447552447552446) internal successors, (785), 286 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 785 transitions. [2022-03-15 21:16:00,734 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 785 transitions. Word has length 15 [2022-03-15 21:16:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:00,735 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 785 transitions. [2022-03-15 21:16:00,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:00,736 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 785 transitions. [2022-03-15 21:16:00,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:00,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:00,738 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:00,754 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 21:16:00,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:00,954 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:00,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1932513693, now seen corresponding path program 18 times [2022-03-15 21:16:00,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:00,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373055169] [2022-03-15 21:16:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:00,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:00,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:00,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373055169] [2022-03-15 21:16:00,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373055169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:00,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691519911] [2022-03-15 21:16:00,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:00,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:01,000 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 21:16:01,017 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 21:16:01,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:16:01,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:16:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:01,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691519911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:01,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:01,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 12 [2022-03-15 21:16:01,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [295694122] [2022-03-15 21:16:01,144 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:01,145 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:01,146 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 23 transitions. [2022-03-15 21:16:01,146 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:01,182 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [11212#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 11210#(< i1 (* 2 N)), 11211#(< i2 (* 2 N))] [2022-03-15 21:16:01,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:01,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:16:01,183 INFO L87 Difference]: Start difference. First operand 287 states and 785 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:01,331 INFO L93 Difference]: Finished difference Result 349 states and 878 transitions. [2022-03-15 21:16:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:16:01,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:01,333 INFO L225 Difference]: With dead ends: 349 [2022-03-15 21:16:01,333 INFO L226 Difference]: Without dead ends: 345 [2022-03-15 21:16:01,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:16:01,333 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:01,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 1 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-15 21:16:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 283. [2022-03-15 21:16:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.734042553191489) internal successors, (771), 282 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 771 transitions. [2022-03-15 21:16:01,338 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 771 transitions. Word has length 15 [2022-03-15 21:16:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:01,338 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 771 transitions. [2022-03-15 21:16:01,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 771 transitions. [2022-03-15 21:16:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:01,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:01,339 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:01,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:01,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:01,567 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash -489217047, now seen corresponding path program 19 times [2022-03-15 21:16:01,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:01,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497543260] [2022-03-15 21:16:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:01,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:01,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:01,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497543260] [2022-03-15 21:16:01,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497543260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:01,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067459756] [2022-03-15 21:16:01,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:01,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:01,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:01,619 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 21:16:01,621 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 21:16:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:16:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:01,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:01,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067459756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:01,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:01,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 12 [2022-03-15 21:16:01,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [203548298] [2022-03-15 21:16:01,764 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:01,765 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:01,766 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:16:01,766 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:01,825 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [12250#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 12249#(< i2 (* 2 N)), 12251#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:01,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:01,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:16:01,825 INFO L87 Difference]: Start difference. First operand 283 states and 771 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:02,094 INFO L93 Difference]: Finished difference Result 523 states and 1218 transitions. [2022-03-15 21:16:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:16:02,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 21:16:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:02,096 INFO L225 Difference]: With dead ends: 523 [2022-03-15 21:16:02,096 INFO L226 Difference]: Without dead ends: 523 [2022-03-15 21:16:02,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:16:02,096 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 58 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:02,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-15 21:16:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 315. [2022-03-15 21:16:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.805732484076433) internal successors, (881), 314 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 881 transitions. [2022-03-15 21:16:02,102 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 881 transitions. Word has length 15 [2022-03-15 21:16:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:02,103 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 881 transitions. [2022-03-15 21:16:02,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 881 transitions. [2022-03-15 21:16:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:02,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:02,103 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:02,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-15 21:16:02,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:02,326 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:02,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1016906070, now seen corresponding path program 20 times [2022-03-15 21:16:02,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:02,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184868238] [2022-03-15 21:16:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:02,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:02,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:02,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184868238] [2022-03-15 21:16:02,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184868238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:02,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939644011] [2022-03-15 21:16:02,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:02,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:02,365 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 21:16:02,371 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 21:16:02,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:02,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:16:02,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:16:02,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:16:02,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939644011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:02,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:02,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2022-03-15 21:16:02,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1703869514] [2022-03-15 21:16:02,468 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:02,468 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:02,470 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 35 transitions. [2022-03-15 21:16:02,470 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:02,625 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [13541#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 13537#(< i2 (* 2 N)), 13538#(< i1 (* 2 N)), 13540#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 13544#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 13543#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 13539#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 13542#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:02,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:16:02,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:16:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:16:02,626 INFO L87 Difference]: Start difference. First operand 315 states and 881 transitions. Second operand has 16 states, 16 states have (on average 2.0625) 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 21:16:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:02,968 INFO L93 Difference]: Finished difference Result 472 states and 1171 transitions. [2022-03-15 21:16:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:16:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) 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 15 [2022-03-15 21:16:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:02,970 INFO L225 Difference]: With dead ends: 472 [2022-03-15 21:16:02,971 INFO L226 Difference]: Without dead ends: 454 [2022-03-15 21:16:02,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1158, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:16:02,972 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:02,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-03-15 21:16:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 315. [2022-03-15 21:16:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.751592356687898) internal successors, (864), 314 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 864 transitions. [2022-03-15 21:16:02,984 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 864 transitions. Word has length 15 [2022-03-15 21:16:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:02,984 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 864 transitions. [2022-03-15 21:16:02,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) 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 21:16:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 864 transitions. [2022-03-15 21:16:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:02,985 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:02,985 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:03,002 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 21:16:03,200 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,SelfDestructingSolverStorable22 [2022-03-15 21:16:03,200 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1244422649, now seen corresponding path program 21 times [2022-03-15 21:16:03,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:03,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529628207] [2022-03-15 21:16:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:03,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:03,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529628207] [2022-03-15 21:16:03,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529628207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:03,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027893568] [2022-03-15 21:16:03,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:03,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:03,239 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 21:16:03,244 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 21:16:03,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:16:03,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:16:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:03,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:03,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027893568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:03,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:03,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 12 [2022-03-15 21:16:03,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1910371511] [2022-03-15 21:16:03,429 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:03,430 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:03,431 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2022-03-15 21:16:03,431 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:03,516 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [14782#(< i2 (* 2 N)), 14784#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 14785#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 14783#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:16:03,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:03,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:16:03,517 INFO L87 Difference]: Start difference. First operand 315 states and 864 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 21:16:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:04,061 INFO L93 Difference]: Finished difference Result 650 states and 1493 transitions. [2022-03-15 21:16:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:16:04,062 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 15 [2022-03-15 21:16:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:04,064 INFO L225 Difference]: With dead ends: 650 [2022-03-15 21:16:04,064 INFO L226 Difference]: Without dead ends: 650 [2022-03-15 21:16:04,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=2055, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:16:04,065 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 108 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:04,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-15 21:16:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 331. [2022-03-15 21:16:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.7606060606060607) internal successors, (911), 330 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 911 transitions. [2022-03-15 21:16:04,074 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 911 transitions. Word has length 15 [2022-03-15 21:16:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:04,074 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 911 transitions. [2022-03-15 21:16:04,074 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 21:16:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 911 transitions. [2022-03-15 21:16:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:04,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:04,075 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:04,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:04,275 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,SelfDestructingSolverStorable23 [2022-03-15 21:16:04,276 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:04,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:04,276 INFO L85 PathProgramCache]: Analyzing trace with hash -436230423, now seen corresponding path program 22 times [2022-03-15 21:16:04,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:04,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058613245] [2022-03-15 21:16:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:04,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:04,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058613245] [2022-03-15 21:16:04,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058613245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:04,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894877601] [2022-03-15 21:16:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:04,340 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 21:16:04,340 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 21:16:04,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:04,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:04,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:16:04,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:04,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:04,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894877601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:04,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:04,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 13 [2022-03-15 21:16:04,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [739560531] [2022-03-15 21:16:04,478 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:04,479 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:04,480 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 21:16:04,480 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:04,531 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [16266#(< i2 (* 2 N)), 16268#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 16267#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:16:04,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:04,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:16:04,532 INFO L87 Difference]: Start difference. First operand 331 states and 911 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:04,624 INFO L93 Difference]: Finished difference Result 481 states and 1157 transitions. [2022-03-15 21:16:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:16:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 21:16:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:04,626 INFO L225 Difference]: With dead ends: 481 [2022-03-15 21:16:04,626 INFO L226 Difference]: Without dead ends: 481 [2022-03-15 21:16:04,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:04,627 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:04,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 1 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-15 21:16:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 342. [2022-03-15 21:16:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.7478005865102637) internal successors, (937), 341 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 937 transitions. [2022-03-15 21:16:04,633 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 937 transitions. Word has length 15 [2022-03-15 21:16:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:04,633 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 937 transitions. [2022-03-15 21:16:04,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:04,633 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 937 transitions. [2022-03-15 21:16:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:04,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:04,634 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:04,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:04,855 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:04,856 INFO L85 PathProgramCache]: Analyzing trace with hash 528691619, now seen corresponding path program 23 times [2022-03-15 21:16:04,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:04,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528959070] [2022-03-15 21:16:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:04,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:04,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:04,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528959070] [2022-03-15 21:16:04,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528959070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:04,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543132200] [2022-03-15 21:16:04,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:04,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:04,899 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 21:16:04,900 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 21:16:04,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:16:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:16:04,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:04,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:05,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543132200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:05,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:05,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 12 [2022-03-15 21:16:05,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881852299] [2022-03-15 21:16:05,048 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:05,048 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:05,049 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2022-03-15 21:16:05,050 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:05,102 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [17542#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 17541#(< i2 (* 2 N))] [2022-03-15 21:16:05,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:05,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:16:05,103 INFO L87 Difference]: Start difference. First operand 342 states and 937 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:05,174 INFO L93 Difference]: Finished difference Result 510 states and 1207 transitions. [2022-03-15 21:16:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:16:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:05,176 INFO L225 Difference]: With dead ends: 510 [2022-03-15 21:16:05,176 INFO L226 Difference]: Without dead ends: 510 [2022-03-15 21:16:05,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:05,177 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 31 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:05,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-15 21:16:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 350. [2022-03-15 21:16:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.7535816618911175) internal successors, (961), 349 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 961 transitions. [2022-03-15 21:16:05,184 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 961 transitions. Word has length 15 [2022-03-15 21:16:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:05,184 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 961 transitions. [2022-03-15 21:16:05,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 961 transitions. [2022-03-15 21:16:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:05,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:05,185 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:05,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-15 21:16:05,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:05,385 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:05,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1342502294, now seen corresponding path program 24 times [2022-03-15 21:16:05,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:05,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082583341] [2022-03-15 21:16:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:05,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:05,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:05,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082583341] [2022-03-15 21:16:05,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082583341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:05,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686097459] [2022-03-15 21:16:05,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:05,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:05,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:05,421 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 21:16:05,422 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 21:16:05,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:16:05,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:05,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:16:05,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:16:05,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:16:05,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686097459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:05,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:05,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2022-03-15 21:16:05,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1073383814] [2022-03-15 21:16:05,525 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:05,525 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:05,527 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 45 transitions. [2022-03-15 21:16:05,527 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:05,719 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [18864#(<= (* 2 N) (+ 2 i2)), 18860#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 18856#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 18858#(< i2 (* 2 N)), 18863#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 18861#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 18857#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 18855#(< i1 (* 2 N)), 18862#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 18859#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:16:05,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:16:05,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:05,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:16:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:05,720 INFO L87 Difference]: Start difference. First operand 350 states and 961 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 21:16:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:06,344 INFO L93 Difference]: Finished difference Result 874 states and 2099 transitions. [2022-03-15 21:16:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:16:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 15 [2022-03-15 21:16:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:06,353 INFO L225 Difference]: With dead ends: 874 [2022-03-15 21:16:06,353 INFO L226 Difference]: Without dead ends: 811 [2022-03-15 21:16:06,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=629, Invalid=2563, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:16:06,354 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 163 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:06,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-03-15 21:16:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 533. [2022-03-15 21:16:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.742481203007519) internal successors, (1459), 532 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1459 transitions. [2022-03-15 21:16:06,375 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1459 transitions. Word has length 15 [2022-03-15 21:16:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:06,375 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 1459 transitions. [2022-03-15 21:16:06,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 21:16:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1459 transitions. [2022-03-15 21:16:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:16:06,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:06,376 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:06,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:06,576 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,SelfDestructingSolverStorable26 [2022-03-15 21:16:06,577 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1114007465, now seen corresponding path program 25 times [2022-03-15 21:16:06,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:06,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898187209] [2022-03-15 21:16:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:06,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:06,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:06,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898187209] [2022-03-15 21:16:06,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898187209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:06,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392131761] [2022-03-15 21:16:06,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:06,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:06,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:06,617 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 21:16:06,618 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 21:16:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:16:06,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:06,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:06,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392131761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:06,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:06,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 12 [2022-03-15 21:16:06,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [24699279] [2022-03-15 21:16:06,796 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:06,796 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:06,798 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 43 transitions. [2022-03-15 21:16:06,798 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:06,980 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [20976#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 20975#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 20972#(< i2 (* 2 N)), 20973#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 20974#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:06,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:06,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:06,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:06,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:06,980 INFO L87 Difference]: Start difference. First operand 533 states and 1459 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:16:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:07,749 INFO L93 Difference]: Finished difference Result 1030 states and 2397 transitions. [2022-03-15 21:16:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 21:16:07,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 15 [2022-03-15 21:16:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:07,753 INFO L225 Difference]: With dead ends: 1030 [2022-03-15 21:16:07,753 INFO L226 Difference]: Without dead ends: 1030 [2022-03-15 21:16:07,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=945, Invalid=3611, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:16:07,754 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 112 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:07,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-03-15 21:16:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 629. [2022-03-15 21:16:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.770700636942675) internal successors, (1740), 628 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1740 transitions. [2022-03-15 21:16:07,766 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1740 transitions. Word has length 15 [2022-03-15 21:16:07,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:07,766 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1740 transitions. [2022-03-15 21:16:07,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:16:07,767 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1740 transitions. [2022-03-15 21:16:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:07,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:07,769 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:07,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:07,989 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,SelfDestructingSolverStorable27 [2022-03-15 21:16:07,989 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:07,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2018871613, now seen corresponding path program 26 times [2022-03-15 21:16:07,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:07,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28011763] [2022-03-15 21:16:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:07,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:08,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:08,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28011763] [2022-03-15 21:16:08,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28011763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:08,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476998575] [2022-03-15 21:16:08,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:08,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:08,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:08,044 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 21:16:08,045 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 21:16:08,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:08,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:08,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476998575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:08,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:08,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-15 21:16:08,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1884940170] [2022-03-15 21:16:08,162 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:08,163 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:08,165 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:16:08,165 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:08,261 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [23480#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 23481#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 23478#(< i2 (* 2 N)), 23479#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 23482#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:16:08,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:16:08,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:16:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:08,262 INFO L87 Difference]: Start difference. First operand 629 states and 1740 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:08,455 INFO L93 Difference]: Finished difference Result 1153 states and 2968 transitions. [2022-03-15 21:16:08,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:16:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:16:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:08,459 INFO L225 Difference]: With dead ends: 1153 [2022-03-15 21:16:08,459 INFO L226 Difference]: Without dead ends: 1148 [2022-03-15 21:16:08,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:16:08,460 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 102 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:08,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-03-15 21:16:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 778. [2022-03-15 21:16:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 2.821106821106821) internal successors, (2192), 777 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2192 transitions. [2022-03-15 21:16:08,473 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2192 transitions. Word has length 17 [2022-03-15 21:16:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:08,473 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 2192 transitions. [2022-03-15 21:16:08,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2192 transitions. [2022-03-15 21:16:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:08,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:08,475 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:08,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:08,690 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,SelfDestructingSolverStorable28 [2022-03-15 21:16:08,690 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2033696195, now seen corresponding path program 27 times [2022-03-15 21:16:08,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:08,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662443398] [2022-03-15 21:16:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:08,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:08,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662443398] [2022-03-15 21:16:08,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662443398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:08,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094396164] [2022-03-15 21:16:08,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:08,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:08,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:08,733 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 21:16:08,734 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 21:16:08,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:16:08,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:08,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:08,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:08,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:08,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094396164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:08,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:08,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2022-03-15 21:16:08,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1873974222] [2022-03-15 21:16:08,886 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:08,886 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:08,888 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2022-03-15 21:16:08,888 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:08,904 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26325#(< i2 (* 2 N))] [2022-03-15 21:16:08,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:16:08,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:16:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:16:08,905 INFO L87 Difference]: Start difference. First operand 778 states and 2192 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:09,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:09,001 INFO L93 Difference]: Finished difference Result 1057 states and 2696 transitions. [2022-03-15 21:16:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:16:09,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:16:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:09,005 INFO L225 Difference]: With dead ends: 1057 [2022-03-15 21:16:09,005 INFO L226 Difference]: Without dead ends: 1056 [2022-03-15 21:16:09,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:09,005 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 57 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:09,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-03-15 21:16:09,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 794. [2022-03-15 21:16:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.82093316519546) internal successors, (2237), 793 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2237 transitions. [2022-03-15 21:16:09,019 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2237 transitions. Word has length 17 [2022-03-15 21:16:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:09,019 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 2237 transitions. [2022-03-15 21:16:09,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2237 transitions. [2022-03-15 21:16:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:09,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:09,021 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:09,054 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 21:16:09,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:09,235 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1534994855, now seen corresponding path program 28 times [2022-03-15 21:16:09,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:09,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873425187] [2022-03-15 21:16:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:09,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:09,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873425187] [2022-03-15 21:16:09,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873425187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:09,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012308534] [2022-03-15 21:16:09,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:09,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:09,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:09,285 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 21:16:09,286 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 21:16:09,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:09,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:09,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:09,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:09,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012308534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:09,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:09,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-03-15 21:16:09,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [747274499] [2022-03-15 21:16:09,458 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:09,458 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:09,460 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:16:09,460 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:09,515 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29095#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:09,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:09,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:09,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:16:09,516 INFO L87 Difference]: Start difference. First operand 794 states and 2237 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:09,637 INFO L93 Difference]: Finished difference Result 1223 states and 3042 transitions. [2022-03-15 21:16:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:16:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 17 [2022-03-15 21:16:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:09,641 INFO L225 Difference]: With dead ends: 1223 [2022-03-15 21:16:09,641 INFO L226 Difference]: Without dead ends: 1223 [2022-03-15 21:16:09,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:09,641 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:09,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-03-15 21:16:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 798. [2022-03-15 21:16:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 2.821831869510665) internal successors, (2249), 797 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2249 transitions. [2022-03-15 21:16:09,656 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2249 transitions. Word has length 17 [2022-03-15 21:16:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:09,656 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2249 transitions. [2022-03-15 21:16:09,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2249 transitions. [2022-03-15 21:16:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:09,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:09,658 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:09,676 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 21:16:09,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:09,874 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:09,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1622968631, now seen corresponding path program 29 times [2022-03-15 21:16:09,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:09,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555502512] [2022-03-15 21:16:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:09,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:09,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:09,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555502512] [2022-03-15 21:16:09,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555502512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:09,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772243216] [2022-03-15 21:16:09,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:09,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:09,909 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 21:16:09,917 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 21:16:09,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:16:09,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:09,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:10,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772243216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:10,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:10,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2022-03-15 21:16:10,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2143104566] [2022-03-15 21:16:10,077 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:10,078 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:10,079 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:16:10,079 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:10,115 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [32041#(< i2 (* 2 N)), 32042#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:16:10,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:10,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:10,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:16:10,116 INFO L87 Difference]: Start difference. First operand 798 states and 2249 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:10,215 INFO L93 Difference]: Finished difference Result 1023 states and 2673 transitions. [2022-03-15 21:16:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:16:10,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 17 [2022-03-15 21:16:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:10,218 INFO L225 Difference]: With dead ends: 1023 [2022-03-15 21:16:10,218 INFO L226 Difference]: Without dead ends: 1021 [2022-03-15 21:16:10,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:10,219 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:10,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-03-15 21:16:10,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 787. [2022-03-15 21:16:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.8142493638676847) internal successors, (2212), 786 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2212 transitions. [2022-03-15 21:16:10,233 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2212 transitions. Word has length 17 [2022-03-15 21:16:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:10,233 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2212 transitions. [2022-03-15 21:16:10,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2212 transitions. [2022-03-15 21:16:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:10,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:10,235 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:10,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:10,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:10,450 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash -647543485, now seen corresponding path program 30 times [2022-03-15 21:16:10,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:10,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528897765] [2022-03-15 21:16:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:10,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:10,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:10,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528897765] [2022-03-15 21:16:10,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528897765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:10,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937675251] [2022-03-15 21:16:10,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:10,491 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 21:16:10,493 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 21:16:10,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:16:10,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:10,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:10,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:10,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937675251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:10,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:10,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2022-03-15 21:16:10,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1897777420] [2022-03-15 21:16:10,664 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:10,665 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:10,666 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2022-03-15 21:16:10,667 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:10,679 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34763#(< i2 (* 2 N))] [2022-03-15 21:16:10,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:16:10,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:10,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:16:10,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:16:10,680 INFO L87 Difference]: Start difference. First operand 787 states and 2212 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:10,822 INFO L93 Difference]: Finished difference Result 1167 states and 2928 transitions. [2022-03-15 21:16:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:16:10,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:16:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:10,826 INFO L225 Difference]: With dead ends: 1167 [2022-03-15 21:16:10,826 INFO L226 Difference]: Without dead ends: 1164 [2022-03-15 21:16:10,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=207, Invalid=345, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:16:10,827 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:10,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-03-15 21:16:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 781. [2022-03-15 21:16:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7897435897435896) internal successors, (2176), 780 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2176 transitions. [2022-03-15 21:16:10,840 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2176 transitions. Word has length 17 [2022-03-15 21:16:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:10,840 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 2176 transitions. [2022-03-15 21:16:10,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2176 transitions. [2022-03-15 21:16:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:10,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:10,842 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:10,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:11,057 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,SelfDestructingSolverStorable32 [2022-03-15 21:16:11,058 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1146244825, now seen corresponding path program 31 times [2022-03-15 21:16:11,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:11,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055892129] [2022-03-15 21:16:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:11,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:11,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055892129] [2022-03-15 21:16:11,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055892129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:11,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253667104] [2022-03-15 21:16:11,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:11,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:11,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:11,109 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 21:16:11,110 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 21:16:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:11,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:11,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253667104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:11,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:11,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-03-15 21:16:11,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1456213257] [2022-03-15 21:16:11,263 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:11,264 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:11,266 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:16:11,266 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:11,307 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37621#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:11,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:11,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:16:11,308 INFO L87 Difference]: Start difference. First operand 781 states and 2176 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:11,426 INFO L93 Difference]: Finished difference Result 1069 states and 2652 transitions. [2022-03-15 21:16:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:16:11,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 17 [2022-03-15 21:16:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:11,429 INFO L225 Difference]: With dead ends: 1069 [2022-03-15 21:16:11,429 INFO L226 Difference]: Without dead ends: 1069 [2022-03-15 21:16:11,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:11,430 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:11,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-03-15 21:16:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 765. [2022-03-15 21:16:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 2.774869109947644) internal successors, (2120), 764 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2120 transitions. [2022-03-15 21:16:11,441 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2120 transitions. Word has length 17 [2022-03-15 21:16:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:11,441 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2120 transitions. [2022-03-15 21:16:11,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2120 transitions. [2022-03-15 21:16:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:11,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:11,443 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:11,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:11,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:11,658 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:11,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2001551479, now seen corresponding path program 32 times [2022-03-15 21:16:11,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:11,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920302228] [2022-03-15 21:16:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:11,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:11,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:11,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920302228] [2022-03-15 21:16:11,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920302228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:11,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029441534] [2022-03-15 21:16:11,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:11,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:11,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:11,703 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 21:16:11,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:11,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:11,741 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 21:16:11,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:11,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:11,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029441534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:11,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:11,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 15 [2022-03-15 21:16:11,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [471052789] [2022-03-15 21:16:11,919 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:11,920 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:11,921 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:16:11,921 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:11,997 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [40349#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 40350#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:16:11,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:11,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:11,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:11,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:11,997 INFO L87 Difference]: Start difference. First operand 765 states and 2120 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) 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 21:16:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:12,173 INFO L93 Difference]: Finished difference Result 1147 states and 2820 transitions. [2022-03-15 21:16:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:16:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 17 [2022-03-15 21:16:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:12,177 INFO L225 Difference]: With dead ends: 1147 [2022-03-15 21:16:12,177 INFO L226 Difference]: Without dead ends: 1147 [2022-03-15 21:16:12,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:16:12,178 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 73 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:12,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-03-15 21:16:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 723. [2022-03-15 21:16:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 2.75207756232687) internal successors, (1987), 722 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1987 transitions. [2022-03-15 21:16:12,189 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1987 transitions. Word has length 17 [2022-03-15 21:16:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:12,189 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1987 transitions. [2022-03-15 21:16:12,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 21:16:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1987 transitions. [2022-03-15 21:16:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:12,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:12,190 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:12,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:12,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:12,403 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash 995041859, now seen corresponding path program 33 times [2022-03-15 21:16:12,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:12,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578549196] [2022-03-15 21:16:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:12,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:12,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578549196] [2022-03-15 21:16:12,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578549196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:12,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216478872] [2022-03-15 21:16:12,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:12,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:12,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:12,444 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 21:16:12,445 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 21:16:12,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:16:12,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:12,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:12,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:12,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:12,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216478872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:12,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:12,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 13 [2022-03-15 21:16:12,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [472324874] [2022-03-15 21:16:12,577 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:12,577 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:12,579 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2022-03-15 21:16:12,579 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:12,621 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [43079#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 43080#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 43078#(< i2 (* 2 N))] [2022-03-15 21:16:12,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:12,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:16:12,621 INFO L87 Difference]: Start difference. First operand 723 states and 1987 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:12,723 INFO L93 Difference]: Finished difference Result 912 states and 2341 transitions. [2022-03-15 21:16:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:16:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:16:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:12,729 INFO L225 Difference]: With dead ends: 912 [2022-03-15 21:16:12,729 INFO L226 Difference]: Without dead ends: 909 [2022-03-15 21:16:12,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:16:12,730 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 77 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:12,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-03-15 21:16:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 754. [2022-03-15 21:16:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.7715803452855248) internal successors, (2087), 753 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2087 transitions. [2022-03-15 21:16:12,740 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2087 transitions. Word has length 17 [2022-03-15 21:16:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:12,740 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2087 transitions. [2022-03-15 21:16:12,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2087 transitions. [2022-03-15 21:16:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:12,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:12,741 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:12,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:12,955 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,SelfDestructingSolverStorable35 [2022-03-15 21:16:12,955 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:12,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1526079129, now seen corresponding path program 34 times [2022-03-15 21:16:12,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:12,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506669484] [2022-03-15 21:16:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:12,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:12,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:12,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506669484] [2022-03-15 21:16:12,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506669484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:12,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269935847] [2022-03-15 21:16:12,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:12,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:12,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:12,992 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 21:16:13,007 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 21:16:13,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:13,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:13,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:13,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269935847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:13,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:13,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10] total 14 [2022-03-15 21:16:13,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2035231704] [2022-03-15 21:16:13,156 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:13,157 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:13,158 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:16:13,158 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:13,197 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [45627#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 45626#(< i2 (* 2 N))] [2022-03-15 21:16:13,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:13,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:16:13,199 INFO L87 Difference]: Start difference. First operand 754 states and 2087 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:13,304 INFO L93 Difference]: Finished difference Result 985 states and 2533 transitions. [2022-03-15 21:16:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:16:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 17 [2022-03-15 21:16:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:13,307 INFO L225 Difference]: With dead ends: 985 [2022-03-15 21:16:13,307 INFO L226 Difference]: Without dead ends: 983 [2022-03-15 21:16:13,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=389, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:13,307 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 65 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:13,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-03-15 21:16:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 787. [2022-03-15 21:16:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.7849872773536894) internal successors, (2189), 786 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2189 transitions. [2022-03-15 21:16:13,321 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2189 transitions. Word has length 17 [2022-03-15 21:16:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:13,321 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2189 transitions. [2022-03-15 21:16:13,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2189 transitions. [2022-03-15 21:16:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:13,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:13,323 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:13,342 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 21:16:13,523 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,SelfDestructingSolverStorable36 [2022-03-15 21:16:13,523 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash 598268963, now seen corresponding path program 35 times [2022-03-15 21:16:13,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:13,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908759224] [2022-03-15 21:16:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:13,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:13,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:13,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908759224] [2022-03-15 21:16:13,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908759224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:13,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923890329] [2022-03-15 21:16:13,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:13,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:13,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:13,571 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 21:16:13,572 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 21:16:13,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:16:13,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:16:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:13,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:13,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923890329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:13,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:13,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 15 [2022-03-15 21:16:13,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [995694616] [2022-03-15 21:16:13,730 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:13,731 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:13,734 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 41 transitions. [2022-03-15 21:16:13,754 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:13,939 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [48319#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 48317#(< i1 (* 2 N)), 48321#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 48322#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 48315#(< i2 (* 2 N)), 48318#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 48323#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 48320#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 48316#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 48324#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:16:13,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:16:13,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:16:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:16:13,940 INFO L87 Difference]: Start difference. First operand 787 states and 2189 transitions. Second operand has 20 states, 20 states have (on average 1.95) 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 21:16:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:14,642 INFO L93 Difference]: Finished difference Result 1119 states and 2788 transitions. [2022-03-15 21:16:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:16:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) 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 17 [2022-03-15 21:16:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:14,644 INFO L225 Difference]: With dead ends: 1119 [2022-03-15 21:16:14,644 INFO L226 Difference]: Without dead ends: 1075 [2022-03-15 21:16:14,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=815, Invalid=3217, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:16:14,646 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 186 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:14,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-03-15 21:16:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 698. [2022-03-15 21:16:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.7230989956958394) internal successors, (1898), 697 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1898 transitions. [2022-03-15 21:16:14,656 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1898 transitions. Word has length 17 [2022-03-15 21:16:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:14,656 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1898 transitions. [2022-03-15 21:16:14,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) 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 21:16:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1898 transitions. [2022-03-15 21:16:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:14,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:14,657 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:14,676 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 21:16:14,872 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,SelfDestructingSolverStorable37 [2022-03-15 21:16:14,873 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:14,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2133372355, now seen corresponding path program 36 times [2022-03-15 21:16:14,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:14,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009133478] [2022-03-15 21:16:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:14,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:14,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:14,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009133478] [2022-03-15 21:16:14,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009133478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:14,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582335722] [2022-03-15 21:16:14,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:14,905 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 21:16:14,906 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 21:16:14,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:16:14,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:14,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:14,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:15,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582335722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:15,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:15,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2022-03-15 21:16:15,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1656471154] [2022-03-15 21:16:15,087 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:15,088 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:15,089 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2022-03-15 21:16:15,089 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:15,104 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51027#(< i2 (* 2 N))] [2022-03-15 21:16:15,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:16:15,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:15,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:16:15,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:16:15,105 INFO L87 Difference]: Start difference. First operand 698 states and 1898 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:15,228 INFO L93 Difference]: Finished difference Result 1063 states and 2593 transitions. [2022-03-15 21:16:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:16:15,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:16:15,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:15,230 INFO L225 Difference]: With dead ends: 1063 [2022-03-15 21:16:15,230 INFO L226 Difference]: Without dead ends: 1061 [2022-03-15 21:16:15,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:16:15,231 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 57 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:15,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-03-15 21:16:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 695. [2022-03-15 21:16:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.7146974063400577) internal successors, (1884), 694 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1884 transitions. [2022-03-15 21:16:15,240 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1884 transitions. Word has length 17 [2022-03-15 21:16:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:15,240 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1884 transitions. [2022-03-15 21:16:15,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1884 transitions. [2022-03-15 21:16:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:15,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:15,241 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:15,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:15,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 21:16:15,456 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1634671015, now seen corresponding path program 37 times [2022-03-15 21:16:15,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:15,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960252367] [2022-03-15 21:16:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:15,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:15,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:15,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960252367] [2022-03-15 21:16:15,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960252367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:15,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346171162] [2022-03-15 21:16:15,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:15,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:15,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:15,499 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 21:16:15,502 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 21:16:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:15,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:15,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346171162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:15,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:15,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-03-15 21:16:15,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1054328117] [2022-03-15 21:16:15,657 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:15,658 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:15,660 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2022-03-15 21:16:15,660 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:15,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53613#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:15,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:15,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:15,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:15,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:16:15,732 INFO L87 Difference]: Start difference. First operand 695 states and 1884 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:15,866 INFO L93 Difference]: Finished difference Result 1029 states and 2473 transitions. [2022-03-15 21:16:15,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:16:15,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 17 [2022-03-15 21:16:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:15,868 INFO L225 Difference]: With dead ends: 1029 [2022-03-15 21:16:15,868 INFO L226 Difference]: Without dead ends: 1029 [2022-03-15 21:16:15,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:16:15,868 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:15,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-03-15 21:16:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 690. [2022-03-15 21:16:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.714078374455733) internal successors, (1870), 689 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1870 transitions. [2022-03-15 21:16:15,877 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1870 transitions. Word has length 17 [2022-03-15 21:16:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:15,877 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1870 transitions. [2022-03-15 21:16:15,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 21:16:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1870 transitions. [2022-03-15 21:16:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:15,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:15,878 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:15,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:16,079 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,SelfDestructingSolverStorable39 [2022-03-15 21:16:16,079 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:16,079 INFO L85 PathProgramCache]: Analyzing trace with hash 779364361, now seen corresponding path program 38 times [2022-03-15 21:16:16,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:16,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873713410] [2022-03-15 21:16:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:16,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:16,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:16,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873713410] [2022-03-15 21:16:16,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873713410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:16,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392183116] [2022-03-15 21:16:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:16,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:16,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:16,129 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 21:16:16,130 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 21:16:16,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:16,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:16,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392183116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:16,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:16,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 16 [2022-03-15 21:16:16,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2020013981] [2022-03-15 21:16:16,288 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:16,289 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:16,291 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2022-03-15 21:16:16,291 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:16,370 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [56156#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 56157#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:16:16,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:16,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:16:16,371 INFO L87 Difference]: Start difference. First operand 690 states and 1870 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) 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 21:16:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:16,534 INFO L93 Difference]: Finished difference Result 917 states and 2227 transitions. [2022-03-15 21:16:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:16:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 17 [2022-03-15 21:16:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:16,536 INFO L225 Difference]: With dead ends: 917 [2022-03-15 21:16:16,536 INFO L226 Difference]: Without dead ends: 917 [2022-03-15 21:16:16,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:16:16,537 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 64 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:16,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-03-15 21:16:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 669. [2022-03-15 21:16:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.694610778443114) internal successors, (1800), 668 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1800 transitions. [2022-03-15 21:16:16,546 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1800 transitions. Word has length 17 [2022-03-15 21:16:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:16,546 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1800 transitions. [2022-03-15 21:16:16,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) 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 21:16:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1800 transitions. [2022-03-15 21:16:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:16,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:16,547 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:16,564 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 21:16:16,762 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,SelfDestructingSolverStorable40 [2022-03-15 21:16:16,762 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 34661863, now seen corresponding path program 39 times [2022-03-15 21:16:16,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:16,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107268728] [2022-03-15 21:16:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:16,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:16,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:16,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107268728] [2022-03-15 21:16:16,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107268728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:16,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926539941] [2022-03-15 21:16:16,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:16,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:16,822 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 21:16:16,825 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 21:16:16,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:16:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:16,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:16,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:16,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926539941] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:16,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:16,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 16 [2022-03-15 21:16:16,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [634190732] [2022-03-15 21:16:16,976 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:16,977 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:16,979 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2022-03-15 21:16:16,979 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:17,086 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [58551#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 58550#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 58552#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:16:17,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:16:17,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:16:17,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:16:17,086 INFO L87 Difference]: Start difference. First operand 669 states and 1800 transitions. Second operand has 14 states, 14 states have (on average 2.0) 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 21:16:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:17,386 INFO L93 Difference]: Finished difference Result 968 states and 2323 transitions. [2022-03-15 21:16:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:16:17,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) 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 21:16:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:17,388 INFO L225 Difference]: With dead ends: 968 [2022-03-15 21:16:17,388 INFO L226 Difference]: Without dead ends: 968 [2022-03-15 21:16:17,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:16:17,389 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 81 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:17,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-03-15 21:16:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 677. [2022-03-15 21:16:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 2.698224852071006) internal successors, (1824), 676 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1824 transitions. [2022-03-15 21:16:17,398 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1824 transitions. Word has length 17 [2022-03-15 21:16:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:17,398 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 1824 transitions. [2022-03-15 21:16:17,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) 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 21:16:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1824 transitions. [2022-03-15 21:16:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:17,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:17,421 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:17,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:17,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 21:16:17,637 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:17,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2052536777, now seen corresponding path program 40 times [2022-03-15 21:16:17,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:17,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843549153] [2022-03-15 21:16:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:17,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:17,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:17,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843549153] [2022-03-15 21:16:17,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843549153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:17,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316543772] [2022-03-15 21:16:17,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:17,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:17,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:17,690 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 21:16:17,691 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 21:16:17,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:17,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:17,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:17,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316543772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:17,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:17,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 16 [2022-03-15 21:16:17,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1874347806] [2022-03-15 21:16:17,817 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:17,818 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:17,819 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:16:17,819 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:17,890 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [61030#(< i2 (* 2 N)), 61031#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 61032#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 61033#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1)))] [2022-03-15 21:16:17,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:16:17,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:16:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:17,891 INFO L87 Difference]: Start difference. First operand 677 states and 1824 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:18,018 INFO L93 Difference]: Finished difference Result 868 states and 2125 transitions. [2022-03-15 21:16:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:16:18,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:16:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:18,020 INFO L225 Difference]: With dead ends: 868 [2022-03-15 21:16:18,020 INFO L226 Difference]: Without dead ends: 864 [2022-03-15 21:16:18,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:16:18,020 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 88 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:18,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-03-15 21:16:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 649. [2022-03-15 21:16:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.674382716049383) internal successors, (1733), 648 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1733 transitions. [2022-03-15 21:16:18,029 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1733 transitions. Word has length 17 [2022-03-15 21:16:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:18,029 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1733 transitions. [2022-03-15 21:16:18,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1733 transitions. [2022-03-15 21:16:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:18,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:18,030 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:18,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:18,240 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,SelfDestructingSolverStorable42 [2022-03-15 21:16:18,240 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1629683203, now seen corresponding path program 41 times [2022-03-15 21:16:18,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:18,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725793013] [2022-03-15 21:16:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:18,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:18,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:18,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725793013] [2022-03-15 21:16:18,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725793013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:18,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675059284] [2022-03-15 21:16:18,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:18,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:18,283 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 21:16:18,283 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 21:16:18,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:16:18,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:18,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:18,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:18,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675059284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:18,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:18,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 15 [2022-03-15 21:16:18,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [350258919] [2022-03-15 21:16:18,414 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:18,414 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:18,416 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:16:18,416 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:18,477 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [63332#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 63330#(< i2 (* 2 N)), 63331#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:16:18,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:16:18,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:16:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:16:18,478 INFO L87 Difference]: Start difference. First operand 649 states and 1733 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:16:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:18,601 INFO L93 Difference]: Finished difference Result 867 states and 2106 transitions. [2022-03-15 21:16:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:16:18,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:16:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:18,603 INFO L225 Difference]: With dead ends: 867 [2022-03-15 21:16:18,603 INFO L226 Difference]: Without dead ends: 864 [2022-03-15 21:16:18,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:16:18,603 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 70 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:18,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-03-15 21:16:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 648. [2022-03-15 21:16:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.670788253477589) internal successors, (1728), 647 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1728 transitions. [2022-03-15 21:16:18,611 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1728 transitions. Word has length 17 [2022-03-15 21:16:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:18,611 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1728 transitions. [2022-03-15 21:16:18,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:16:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1728 transitions. [2022-03-15 21:16:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:18,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:18,612 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:18,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:18,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:18,828 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:18,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1477495433, now seen corresponding path program 42 times [2022-03-15 21:16:18,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:18,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273322421] [2022-03-15 21:16:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:18,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:18,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273322421] [2022-03-15 21:16:18,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273322421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:18,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992913874] [2022-03-15 21:16:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:18,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:18,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:18,884 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 21:16:18,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:16:18,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:18,921 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 21:16:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:18,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:19,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992913874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:19,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:19,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-03-15 21:16:19,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [317430711] [2022-03-15 21:16:19,018 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:19,019 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:19,020 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:16:19,021 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:19,055 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [65629#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 65628#(< i2 (* 2 N))] [2022-03-15 21:16:19,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:19,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:19,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:19,055 INFO L87 Difference]: Start difference. First operand 648 states and 1728 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 21:16:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:19,181 INFO L93 Difference]: Finished difference Result 871 states and 2119 transitions. [2022-03-15 21:16:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:16:19,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 17 [2022-03-15 21:16:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:19,183 INFO L225 Difference]: With dead ends: 871 [2022-03-15 21:16:19,183 INFO L226 Difference]: Without dead ends: 869 [2022-03-15 21:16:19,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:16:19,185 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:19,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-03-15 21:16:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 648. [2022-03-15 21:16:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.6676970633693973) internal successors, (1726), 647 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1726 transitions. [2022-03-15 21:16:19,198 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1726 transitions. Word has length 17 [2022-03-15 21:16:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:19,198 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1726 transitions. [2022-03-15 21:16:19,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 21:16:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1726 transitions. [2022-03-15 21:16:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:19,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:19,199 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:19,227 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 21:16:19,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:19,412 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash -693123771, now seen corresponding path program 43 times [2022-03-15 21:16:19,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:19,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836295319] [2022-03-15 21:16:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:19,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:19,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836295319] [2022-03-15 21:16:19,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836295319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:19,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720181377] [2022-03-15 21:16:19,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:19,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:19,465 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 21:16:19,465 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 21:16:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:16:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:16:19,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:16:19,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720181377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:19,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:19,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2022-03-15 21:16:19,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [110431684] [2022-03-15 21:16:19,594 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:19,595 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:19,597 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 53 transitions. [2022-03-15 21:16:19,598 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:19,841 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [67932#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 67940#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 67941#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 67937#(<= (* 2 N) (+ 3 i2)), 67933#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 67939#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 67938#(< i1 (* 2 N)), 67930#(< i2 (* 2 N)), 67934#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 67935#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 67931#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 67936#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:16:19,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:16:19,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:16:19,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:16:19,842 INFO L87 Difference]: Start difference. First operand 648 states and 1726 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) 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 21:16:20,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:20,660 INFO L93 Difference]: Finished difference Result 956 states and 2267 transitions. [2022-03-15 21:16:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:16:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) 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 17 [2022-03-15 21:16:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:20,662 INFO L225 Difference]: With dead ends: 956 [2022-03-15 21:16:20,662 INFO L226 Difference]: Without dead ends: 917 [2022-03-15 21:16:20,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1020, Invalid=4382, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:16:20,663 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 201 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:20,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-03-15 21:16:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 611. [2022-03-15 21:16:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.6672131147540985) internal successors, (1627), 610 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1627 transitions. [2022-03-15 21:16:20,671 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1627 transitions. Word has length 17 [2022-03-15 21:16:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:20,671 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1627 transitions. [2022-03-15 21:16:20,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) 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 21:16:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1627 transitions. [2022-03-15 21:16:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:20,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:20,672 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:20,687 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 21:16:20,875 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,SelfDestructingSolverStorable45 [2022-03-15 21:16:20,875 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1852549821, now seen corresponding path program 44 times [2022-03-15 21:16:20,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:20,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796015932] [2022-03-15 21:16:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:20,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:20,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:20,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796015932] [2022-03-15 21:16:20,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796015932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:20,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805644330] [2022-03-15 21:16:20,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:20,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:20,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:20,912 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 21:16:20,913 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 21:16:20,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:20,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:20,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:21,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805644330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:21,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:21,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2022-03-15 21:16:21,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [197833835] [2022-03-15 21:16:21,052 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:21,053 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:21,055 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:16:21,055 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:21,093 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [70325#(< i2 (* 2 N))] [2022-03-15 21:16:21,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:16:21,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:16:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:16:21,093 INFO L87 Difference]: Start difference. First operand 611 states and 1627 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 21:16:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:21,228 INFO L93 Difference]: Finished difference Result 860 states and 2123 transitions. [2022-03-15 21:16:21,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:16:21,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 21:16:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:21,230 INFO L225 Difference]: With dead ends: 860 [2022-03-15 21:16:21,230 INFO L226 Difference]: Without dead ends: 859 [2022-03-15 21:16:21,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:16:21,230 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 38 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:21,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-03-15 21:16:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 653. [2022-03-15 21:16:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.696319018404908) internal successors, (1758), 652 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1758 transitions. [2022-03-15 21:16:21,238 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1758 transitions. Word has length 17 [2022-03-15 21:16:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:21,238 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1758 transitions. [2022-03-15 21:16:21,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 21:16:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1758 transitions. [2022-03-15 21:16:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:21,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:21,239 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:21,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:21,454 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,SelfDestructingSolverStorable46 [2022-03-15 21:16:21,454 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1943716135, now seen corresponding path program 45 times [2022-03-15 21:16:21,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:21,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122371888] [2022-03-15 21:16:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:21,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:21,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:21,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122371888] [2022-03-15 21:16:21,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122371888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:21,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827177534] [2022-03-15 21:16:21,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:21,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:21,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:21,502 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 21:16:21,517 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 21:16:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:16:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:21,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:21,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:21,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827177534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:21,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:21,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-03-15 21:16:21,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2014802103] [2022-03-15 21:16:21,635 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:21,635 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:21,637 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2022-03-15 21:16:21,637 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:21,699 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [72628#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:21,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:16:21,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:16:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:16:21,699 INFO L87 Difference]: Start difference. First operand 653 states and 1758 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 21:16:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:21,787 INFO L93 Difference]: Finished difference Result 861 states and 2130 transitions. [2022-03-15 21:16:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:16:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 17 [2022-03-15 21:16:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:21,789 INFO L225 Difference]: With dead ends: 861 [2022-03-15 21:16:21,789 INFO L226 Difference]: Without dead ends: 861 [2022-03-15 21:16:21,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:16:21,790 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:21,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:16:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-03-15 21:16:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 653. [2022-03-15 21:16:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.696319018404908) internal successors, (1758), 652 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1758 transitions. [2022-03-15 21:16:21,797 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1758 transitions. Word has length 17 [2022-03-15 21:16:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:21,797 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1758 transitions. [2022-03-15 21:16:21,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 21:16:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1758 transitions. [2022-03-15 21:16:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:21,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:21,798 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:21,814 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 21:16:22,010 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,SelfDestructingSolverStorable47 [2022-03-15 21:16:22,011 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1088409481, now seen corresponding path program 46 times [2022-03-15 21:16:22,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:22,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689870926] [2022-03-15 21:16:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:22,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:22,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:22,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689870926] [2022-03-15 21:16:22,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689870926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:22,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51494992] [2022-03-15 21:16:22,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:22,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:22,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:22,060 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 21:16:22,061 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 21:16:22,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:22,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:22,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:22,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51494992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:22,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:22,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 15 [2022-03-15 21:16:22,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1709319869] [2022-03-15 21:16:22,199 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:22,201 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:22,203 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 37 transitions. [2022-03-15 21:16:22,203 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:22,277 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [74929#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 74928#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:22,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:22,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:22,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:22,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:22,277 INFO L87 Difference]: Start difference. First operand 653 states and 1758 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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 21:16:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:22,400 INFO L93 Difference]: Finished difference Result 831 states and 2070 transitions. [2022-03-15 21:16:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:16:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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 21:16:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:22,402 INFO L225 Difference]: With dead ends: 831 [2022-03-15 21:16:22,402 INFO L226 Difference]: Without dead ends: 831 [2022-03-15 21:16:22,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=249, Invalid=621, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:16:22,402 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 63 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:22,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-03-15 21:16:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 653. [2022-03-15 21:16:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.696319018404908) internal successors, (1758), 652 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1758 transitions. [2022-03-15 21:16:22,409 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1758 transitions. Word has length 17 [2022-03-15 21:16:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:22,409 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1758 transitions. [2022-03-15 21:16:22,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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 21:16:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1758 transitions. [2022-03-15 21:16:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:22,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:22,410 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:22,426 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 21:16:22,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:22,611 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:22,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 343706983, now seen corresponding path program 47 times [2022-03-15 21:16:22,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:22,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10035022] [2022-03-15 21:16:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:22,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:22,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:22,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10035022] [2022-03-15 21:16:22,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10035022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:22,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714653061] [2022-03-15 21:16:22,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:22,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:22,663 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 21:16:22,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:16:22,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:22,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:22,690 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 21:16:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:22,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:22,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714653061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:22,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:22,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 16 [2022-03-15 21:16:22,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [431438525] [2022-03-15 21:16:22,810 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:22,811 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:22,812 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 41 transitions. [2022-03-15 21:16:22,812 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:22,955 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [77205#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 77206#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 77204#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:22,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:16:22,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:22,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:16:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:16:22,956 INFO L87 Difference]: Start difference. First operand 653 states and 1758 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 21:16:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:23,209 INFO L93 Difference]: Finished difference Result 777 states and 1954 transitions. [2022-03-15 21:16:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:16:23,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 21:16:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:23,211 INFO L225 Difference]: With dead ends: 777 [2022-03-15 21:16:23,211 INFO L226 Difference]: Without dead ends: 777 [2022-03-15 21:16:23,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=346, Invalid=986, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:16:23,212 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:23,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-03-15 21:16:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 637. [2022-03-15 21:16:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.6823899371069184) internal successors, (1706), 636 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1706 transitions. [2022-03-15 21:16:23,218 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1706 transitions. Word has length 17 [2022-03-15 21:16:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:23,218 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1706 transitions. [2022-03-15 21:16:23,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 21:16:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1706 transitions. [2022-03-15 21:16:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:16:23,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:23,219 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:23,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:23,429 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,SelfDestructingSolverStorable49 [2022-03-15 21:16:23,429 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1267233975, now seen corresponding path program 48 times [2022-03-15 21:16:23,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:23,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368816464] [2022-03-15 21:16:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:23,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:23,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368816464] [2022-03-15 21:16:23,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368816464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:23,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978895318] [2022-03-15 21:16:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:23,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:23,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:23,485 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 21:16:23,486 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 21:16:23,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:16:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:23,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:23,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:23,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:23,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978895318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:23,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:23,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-15 21:16:23,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1343151731] [2022-03-15 21:16:23,623 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:23,623 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:23,626 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 49 transitions. [2022-03-15 21:16:23,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:23,817 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [79405#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 79407#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 79408#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 79406#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:16:23,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:16:23,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:16:23,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:23,818 INFO L87 Difference]: Start difference. First operand 637 states and 1706 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 21:16:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:24,123 INFO L93 Difference]: Finished difference Result 858 states and 2102 transitions. [2022-03-15 21:16:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:16:24,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 21:16:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:24,124 INFO L225 Difference]: With dead ends: 858 [2022-03-15 21:16:24,124 INFO L226 Difference]: Without dead ends: 858 [2022-03-15 21:16:24,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:16:24,125 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:24,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-03-15 21:16:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 634. [2022-03-15 21:16:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.6951026856240126) internal successors, (1706), 633 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1706 transitions. [2022-03-15 21:16:24,132 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1706 transitions. Word has length 17 [2022-03-15 21:16:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:24,133 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1706 transitions. [2022-03-15 21:16:24,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 21:16:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1706 transitions. [2022-03-15 21:16:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:24,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:24,134 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:24,149 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 21:16:24,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:24,349 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:24,349 INFO L85 PathProgramCache]: Analyzing trace with hash -906426584, now seen corresponding path program 49 times [2022-03-15 21:16:24,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:24,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923586737] [2022-03-15 21:16:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:24,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:24,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:24,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923586737] [2022-03-15 21:16:24,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923586737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:24,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177714406] [2022-03-15 21:16:24,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:24,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:24,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:24,431 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 21:16:24,432 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 21:16:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:24,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:24,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:24,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:24,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177714406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:24,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:24,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 22 [2022-03-15 21:16:24,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [916699871] [2022-03-15 21:16:24,571 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:24,572 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:24,574 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:16:24,574 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:24,641 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [81705#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 81704#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 81703#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 81706#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 81702#(< i2 (* 2 N))] [2022-03-15 21:16:24,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:16:24,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:16:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:16:24,641 INFO L87 Difference]: Start difference. First operand 634 states and 1706 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 21:16:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:24,750 INFO L93 Difference]: Finished difference Result 851 states and 2117 transitions. [2022-03-15 21:16:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:16:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:16:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:24,752 INFO L225 Difference]: With dead ends: 851 [2022-03-15 21:16:24,752 INFO L226 Difference]: Without dead ends: 851 [2022-03-15 21:16:24,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:16:24,753 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 64 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:24,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-03-15 21:16:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 667. [2022-03-15 21:16:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.7162162162162162) internal successors, (1809), 666 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1809 transitions. [2022-03-15 21:16:24,760 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1809 transitions. Word has length 19 [2022-03-15 21:16:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:24,760 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1809 transitions. [2022-03-15 21:16:24,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 21:16:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1809 transitions. [2022-03-15 21:16:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:24,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:24,761 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:24,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:24,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 21:16:24,977 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:24,978 INFO L85 PathProgramCache]: Analyzing trace with hash -177309053, now seen corresponding path program 50 times [2022-03-15 21:16:24,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:24,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732512521] [2022-03-15 21:16:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:25,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:25,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732512521] [2022-03-15 21:16:25,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732512521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:25,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717552380] [2022-03-15 21:16:25,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:25,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:25,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:25,035 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 21:16:25,036 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 21:16:25,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:25,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:25,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:25,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717552380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:25,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:25,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-15 21:16:25,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1354167059] [2022-03-15 21:16:25,179 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:25,181 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:25,183 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:16:25,183 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:25,262 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [84043#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 84038#(< i2 (* 2 N)), 84041#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 84039#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 84040#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 84042#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:16:25,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:16:25,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:16:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:16:25,262 INFO L87 Difference]: Start difference. First operand 667 states and 1809 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 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 21:16:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:25,393 INFO L93 Difference]: Finished difference Result 792 states and 1979 transitions. [2022-03-15 21:16:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:16:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 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 21:16:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:25,395 INFO L225 Difference]: With dead ends: 792 [2022-03-15 21:16:25,395 INFO L226 Difference]: Without dead ends: 788 [2022-03-15 21:16:25,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:16:25,396 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:25,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-03-15 21:16:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 655. [2022-03-15 21:16:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.694189602446483) internal successors, (1762), 654 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1762 transitions. [2022-03-15 21:16:25,403 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1762 transitions. Word has length 19 [2022-03-15 21:16:25,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:25,403 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1762 transitions. [2022-03-15 21:16:25,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 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 21:16:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1762 transitions. [2022-03-15 21:16:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:25,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:25,404 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:25,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:25,611 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,SelfDestructingSolverStorable52 [2022-03-15 21:16:25,611 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1277689341, now seen corresponding path program 51 times [2022-03-15 21:16:25,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:25,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655231911] [2022-03-15 21:16:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:25,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:25,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:25,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655231911] [2022-03-15 21:16:25,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655231911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:25,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662341720] [2022-03-15 21:16:25,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:25,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:25,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:25,682 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 21:16:25,683 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 21:16:25,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:16:25,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:25,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:25,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:25,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:25,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662341720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:25,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:25,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 17 [2022-03-15 21:16:25,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2008323160] [2022-03-15 21:16:25,849 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:25,850 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:25,852 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 21:16:25,852 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:25,889 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [86295#(< i2 (* 2 N)), 86296#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 86294#(< i1 (* 2 N))] [2022-03-15 21:16:25,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:25,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:25,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:25,890 INFO L87 Difference]: Start difference. First operand 655 states and 1762 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:26,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:26,101 INFO L93 Difference]: Finished difference Result 768 states and 1946 transitions. [2022-03-15 21:16:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:16:26,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 19 [2022-03-15 21:16:26,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:26,103 INFO L225 Difference]: With dead ends: 768 [2022-03-15 21:16:26,103 INFO L226 Difference]: Without dead ends: 762 [2022-03-15 21:16:26,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:16:26,103 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:26,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-15 21:16:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 649. [2022-03-15 21:16:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.683641975308642) internal successors, (1739), 648 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1739 transitions. [2022-03-15 21:16:26,111 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1739 transitions. Word has length 19 [2022-03-15 21:16:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:26,111 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1739 transitions. [2022-03-15 21:16:26,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1739 transitions. [2022-03-15 21:16:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:26,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:26,112 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:26,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 21:16:26,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:26,327 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -159988919, now seen corresponding path program 52 times [2022-03-15 21:16:26,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:26,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913614715] [2022-03-15 21:16:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:26,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:26,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:26,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913614715] [2022-03-15 21:16:26,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913614715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:26,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128476364] [2022-03-15 21:16:26,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:26,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:26,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:26,372 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 21:16:26,374 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 21:16:26,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:26,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:26,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:26,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:26,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:26,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128476364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:26,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:26,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 17 [2022-03-15 21:16:26,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1798588512] [2022-03-15 21:16:26,564 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:26,566 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:26,568 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2022-03-15 21:16:26,568 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:26,635 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [88527#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 88526#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 88525#(< i2 (* 2 N))] [2022-03-15 21:16:26,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:26,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:26,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:26,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:26,636 INFO L87 Difference]: Start difference. First operand 649 states and 1739 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 21:16:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:27,052 INFO L93 Difference]: Finished difference Result 1059 states and 2536 transitions. [2022-03-15 21:16:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:16:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 19 [2022-03-15 21:16:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:27,055 INFO L225 Difference]: With dead ends: 1059 [2022-03-15 21:16:27,055 INFO L226 Difference]: Without dead ends: 1050 [2022-03-15 21:16:27,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=639, Invalid=1617, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:16:27,055 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:27,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-03-15 21:16:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 737. [2022-03-15 21:16:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.7418478260869565) internal successors, (2018), 736 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2018 transitions. [2022-03-15 21:16:27,064 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2018 transitions. Word has length 19 [2022-03-15 21:16:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:27,064 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2018 transitions. [2022-03-15 21:16:27,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 21:16:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2018 transitions. [2022-03-15 21:16:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:27,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:27,065 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:27,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:27,280 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,SelfDestructingSolverStorable54 [2022-03-15 21:16:27,280 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash -320032381, now seen corresponding path program 53 times [2022-03-15 21:16:27,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:27,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633698676] [2022-03-15 21:16:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:27,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:27,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:27,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633698676] [2022-03-15 21:16:27,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633698676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:27,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720577247] [2022-03-15 21:16:27,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:27,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:27,325 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 21:16:27,326 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 21:16:27,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:16:27,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:27,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:27,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:27,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720577247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:27,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:27,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-03-15 21:16:27,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1301639993] [2022-03-15 21:16:27,511 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:27,512 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:27,514 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 25 transitions. [2022-03-15 21:16:27,514 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:27,543 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [91239#(< i2 (* 2 N)), 91240#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:16:27,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:27,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:27,543 INFO L87 Difference]: Start difference. First operand 737 states and 2018 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21:16:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:27,619 INFO L93 Difference]: Finished difference Result 1031 states and 2597 transitions. [2022-03-15 21:16:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:16:27,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 19 [2022-03-15 21:16:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:27,621 INFO L225 Difference]: With dead ends: 1031 [2022-03-15 21:16:27,621 INFO L226 Difference]: Without dead ends: 1029 [2022-03-15 21:16:27,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:27,621 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:27,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-03-15 21:16:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 769. [2022-03-15 21:16:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 2.7643229166666665) internal successors, (2123), 768 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2123 transitions. [2022-03-15 21:16:27,638 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2123 transitions. Word has length 19 [2022-03-15 21:16:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:27,638 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2123 transitions. [2022-03-15 21:16:27,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21:16:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2123 transitions. [2022-03-15 21:16:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:27,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:27,639 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:27,655 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 21:16:27,854 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,SelfDestructingSolverStorable55 [2022-03-15 21:16:27,855 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:27,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1100028412, now seen corresponding path program 54 times [2022-03-15 21:16:27,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:27,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868966899] [2022-03-15 21:16:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:27,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:27,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:27,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868966899] [2022-03-15 21:16:27,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868966899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:27,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407416867] [2022-03-15 21:16:27,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:27,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:27,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:27,890 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 21:16:27,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:16:27,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:27,939 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 21:16:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:27,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:27,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:28,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407416867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:28,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:28,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 18 [2022-03-15 21:16:28,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2078142960] [2022-03-15 21:16:28,056 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:28,057 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:28,059 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 21:16:28,059 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:28,139 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [93945#(< i2 (* 2 N)), 93946#(< i1 (* 2 N)), 93949#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 93948#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 93950#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 93947#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 93951#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 93900#(<= (* 2 N) (+ i2 1))] [2022-03-15 21:16:28,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:16:28,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:16:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:16:28,139 INFO L87 Difference]: Start difference. First operand 769 states and 2123 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:28,422 INFO L93 Difference]: Finished difference Result 1037 states and 2624 transitions. [2022-03-15 21:16:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:16:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:16:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:28,423 INFO L225 Difference]: With dead ends: 1037 [2022-03-15 21:16:28,423 INFO L226 Difference]: Without dead ends: 1019 [2022-03-15 21:16:28,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=722, Invalid=2358, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:16:28,424 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:28,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-03-15 21:16:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 766. [2022-03-15 21:16:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 2.750326797385621) internal successors, (2104), 765 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2104 transitions. [2022-03-15 21:16:28,433 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2104 transitions. Word has length 19 [2022-03-15 21:16:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:28,433 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 2104 transitions. [2022-03-15 21:16:28,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2104 transitions. [2022-03-15 21:16:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:28,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:28,434 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:28,449 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 21:16:28,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:28,649 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1876224423, now seen corresponding path program 55 times [2022-03-15 21:16:28,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:28,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946584166] [2022-03-15 21:16:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:28,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:28,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:28,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946584166] [2022-03-15 21:16:28,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946584166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:28,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369246378] [2022-03-15 21:16:28,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:28,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:28,683 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 21:16:28,684 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 21:16:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:28,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:28,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:28,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:28,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369246378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:28,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:28,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 17 [2022-03-15 21:16:28,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1848310314] [2022-03-15 21:16:28,812 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:28,813 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:28,815 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:16:28,815 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:28,879 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [96708#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 96707#(< i2 (* 2 N)), 96710#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 96709#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:28,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:16:28,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:16:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:28,880 INFO L87 Difference]: Start difference. First operand 766 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 21:16:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:29,519 INFO L93 Difference]: Finished difference Result 1347 states and 3222 transitions. [2022-03-15 21:16:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 21:16:29,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 19 [2022-03-15 21:16:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:29,520 INFO L225 Difference]: With dead ends: 1347 [2022-03-15 21:16:29,521 INFO L226 Difference]: Without dead ends: 1324 [2022-03-15 21:16:29,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1031, Invalid=3391, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:16:29,521 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 115 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:29,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-03-15 21:16:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 855. [2022-03-15 21:16:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 2.782201405152225) internal successors, (2376), 854 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2376 transitions. [2022-03-15 21:16:29,550 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2376 transitions. Word has length 19 [2022-03-15 21:16:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:29,550 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 2376 transitions. [2022-03-15 21:16:29,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 21:16:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2376 transitions. [2022-03-15 21:16:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:29,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:29,552 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:29,579 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 21:16:29,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:29,767 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:29,768 INFO L85 PathProgramCache]: Analyzing trace with hash -10987261, now seen corresponding path program 56 times [2022-03-15 21:16:29,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:29,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087489516] [2022-03-15 21:16:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:29,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:29,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:29,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087489516] [2022-03-15 21:16:29,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087489516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:29,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53137440] [2022-03-15 21:16:29,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:29,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:29,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:29,820 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 21:16:29,837 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 21:16:29,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:29,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:29,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:29,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:30,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53137440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:30,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:30,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-03-15 21:16:30,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [601404908] [2022-03-15 21:16:30,017 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:30,018 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:30,020 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 25 transitions. [2022-03-15 21:16:30,020 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:30,047 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [99982#(< i2 (* 2 N)), 99983#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:16:30,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:30,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:30,048 INFO L87 Difference]: Start difference. First operand 855 states and 2376 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21:16:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:30,117 INFO L93 Difference]: Finished difference Result 1096 states and 2820 transitions. [2022-03-15 21:16:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:16:30,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 19 [2022-03-15 21:16:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:30,118 INFO L225 Difference]: With dead ends: 1096 [2022-03-15 21:16:30,119 INFO L226 Difference]: Without dead ends: 1094 [2022-03-15 21:16:30,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:16:30,119 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 51 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:30,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-03-15 21:16:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 867. [2022-03-15 21:16:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.7898383371824482) internal successors, (2416), 866 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2416 transitions. [2022-03-15 21:16:30,130 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2416 transitions. Word has length 19 [2022-03-15 21:16:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:30,131 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 2416 transitions. [2022-03-15 21:16:30,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21:16:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2416 transitions. [2022-03-15 21:16:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:30,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:30,132 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:30,171 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 21:16:30,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:30,348 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1882181174, now seen corresponding path program 57 times [2022-03-15 21:16:30,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:30,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198811544] [2022-03-15 21:16:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:30,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:30,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:30,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198811544] [2022-03-15 21:16:30,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198811544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:30,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900096112] [2022-03-15 21:16:30,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:30,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:30,409 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 21:16:30,410 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 21:16:30,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:16:30,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:16:30,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 21:16:30,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-15 21:16:30,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900096112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:30,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:30,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 20 [2022-03-15 21:16:30,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193515498] [2022-03-15 21:16:30,618 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:30,619 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:30,621 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 43 transitions. [2022-03-15 21:16:30,621 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:30,800 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [102949#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 102953#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 102954#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 102955#(<= (* 2 N) (+ 2 i2)), 102950#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 102951#(< i1 (* 2 N)), 102952#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 102902#(< i2 (* 2 N)), 102947#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 102948#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:30,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:16:30,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:30,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:16:30,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:16:30,800 INFO L87 Difference]: Start difference. First operand 867 states and 2416 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:16:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:31,637 INFO L93 Difference]: Finished difference Result 1287 states and 3270 transitions. [2022-03-15 21:16:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:16:31,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 19 [2022-03-15 21:16:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:31,639 INFO L225 Difference]: With dead ends: 1287 [2022-03-15 21:16:31,639 INFO L226 Difference]: Without dead ends: 1255 [2022-03-15 21:16:31,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=871, Invalid=4981, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:16:31,640 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 141 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:31,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-03-15 21:16:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 835. [2022-03-15 21:16:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 2.7685851318944845) internal successors, (2309), 834 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2309 transitions. [2022-03-15 21:16:31,650 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2309 transitions. Word has length 19 [2022-03-15 21:16:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:31,650 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 2309 transitions. [2022-03-15 21:16:31,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:16:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2309 transitions. [2022-03-15 21:16:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:31,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:31,652 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:31,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:31,867 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,SelfDestructingSolverStorable59 [2022-03-15 21:16:31,867 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash 574328585, now seen corresponding path program 58 times [2022-03-15 21:16:31,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:31,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90660757] [2022-03-15 21:16:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:31,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:31,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:31,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90660757] [2022-03-15 21:16:31,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90660757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:31,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292822136] [2022-03-15 21:16:31,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:31,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:31,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:31,928 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 21:16:31,929 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 21:16:31,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:31,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:31,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:31,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:32,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292822136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:32,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:32,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 17 [2022-03-15 21:16:32,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [61249934] [2022-03-15 21:16:32,064 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:32,065 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:32,068 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 21:16:32,068 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:32,143 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [106135#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 106134#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 106137#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 106136#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 106133#(< i2 (* 2 N))] [2022-03-15 21:16:32,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:16:32,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:16:32,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:16:32,144 INFO L87 Difference]: Start difference. First operand 835 states and 2309 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 21:16:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:32,907 INFO L93 Difference]: Finished difference Result 1475 states and 3502 transitions. [2022-03-15 21:16:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 21:16:32,908 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 21:16:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:32,909 INFO L225 Difference]: With dead ends: 1475 [2022-03-15 21:16:32,909 INFO L226 Difference]: Without dead ends: 1438 [2022-03-15 21:16:32,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1312, Invalid=4850, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:16:32,911 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 133 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:32,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-03-15 21:16:32,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 914. [2022-03-15 21:16:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.7853231106243155) internal successors, (2543), 913 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2543 transitions. [2022-03-15 21:16:32,922 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2543 transitions. Word has length 19 [2022-03-15 21:16:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:32,923 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2543 transitions. [2022-03-15 21:16:32,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 21:16:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2543 transitions. [2022-03-15 21:16:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:32,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:32,924 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:32,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:33,131 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,SelfDestructingSolverStorable60 [2022-03-15 21:16:33,131 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:33,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1670290947, now seen corresponding path program 59 times [2022-03-15 21:16:33,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:33,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121402635] [2022-03-15 21:16:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:33,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:33,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:33,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121402635] [2022-03-15 21:16:33,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121402635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:33,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029683301] [2022-03-15 21:16:33,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:33,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:33,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:33,183 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 21:16:33,183 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 21:16:33,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:16:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:33,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:33,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029683301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:33,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:33,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 16 [2022-03-15 21:16:33,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1533363872] [2022-03-15 21:16:33,308 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:33,309 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:33,311 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2022-03-15 21:16:33,311 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:33,360 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [109678#(< i2 (* 2 N)), 109680#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 109679#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 109681#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N)))] [2022-03-15 21:16:33,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:16:33,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:16:33,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:33,360 INFO L87 Difference]: Start difference. First operand 914 states and 2543 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:33,438 INFO L93 Difference]: Finished difference Result 1105 states and 2888 transitions. [2022-03-15 21:16:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:16:33,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:16:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:33,440 INFO L225 Difference]: With dead ends: 1105 [2022-03-15 21:16:33,440 INFO L226 Difference]: Without dead ends: 1102 [2022-03-15 21:16:33,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:16:33,440 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:33,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:16:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-03-15 21:16:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 870. [2022-03-15 21:16:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 2.767548906789413) internal successors, (2405), 869 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2405 transitions. [2022-03-15 21:16:33,465 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2405 transitions. Word has length 19 [2022-03-15 21:16:33,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:33,465 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 2405 transitions. [2022-03-15 21:16:33,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:33,465 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2405 transitions. [2022-03-15 21:16:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:33,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:33,466 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:33,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 21:16:33,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-15 21:16:33,682 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1940588903, now seen corresponding path program 60 times [2022-03-15 21:16:33,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:33,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276385795] [2022-03-15 21:16:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:33,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:33,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276385795] [2022-03-15 21:16:33,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276385795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:33,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789610534] [2022-03-15 21:16:33,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:33,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:33,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:33,737 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 21:16:33,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:16:33,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:33,760 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 21:16:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:33,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:33,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789610534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:33,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:33,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 17 [2022-03-15 21:16:33,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32738853] [2022-03-15 21:16:33,890 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:33,891 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:33,893 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2022-03-15 21:16:33,893 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:33,922 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [112667#(< i2 (* 2 N)), 112669#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 112668#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:16:33,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:16:33,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:16:33,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:33,923 INFO L87 Difference]: Start difference. First operand 870 states and 2405 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:16:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:34,016 INFO L93 Difference]: Finished difference Result 1075 states and 2773 transitions. [2022-03-15 21:16:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:16:34,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 19 [2022-03-15 21:16:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:34,018 INFO L225 Difference]: With dead ends: 1075 [2022-03-15 21:16:34,018 INFO L226 Difference]: Without dead ends: 1075 [2022-03-15 21:16:34,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:16:34,018 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:34,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-03-15 21:16:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 876. [2022-03-15 21:16:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.769142857142857) internal successors, (2423), 875 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2423 transitions. [2022-03-15 21:16:34,028 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2423 transitions. Word has length 19 [2022-03-15 21:16:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:34,028 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 2423 transitions. [2022-03-15 21:16:34,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21:16:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2423 transitions. [2022-03-15 21:16:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:34,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:34,029 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:34,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:34,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:34,245 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash 979476867, now seen corresponding path program 61 times [2022-03-15 21:16:34,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:34,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95094914] [2022-03-15 21:16:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:34,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:34,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95094914] [2022-03-15 21:16:34,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95094914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:34,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023761573] [2022-03-15 21:16:34,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:34,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:34,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:34,287 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 21:16:34,288 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 21:16:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:34,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:34,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023761573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:34,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:34,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 15 [2022-03-15 21:16:34,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1884888896] [2022-03-15 21:16:34,465 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:34,466 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:34,468 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 25 transitions. [2022-03-15 21:16:34,468 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:34,494 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [115632#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 115631#(< i2 (* 2 N))] [2022-03-15 21:16:34,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:34,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:16:34,495 INFO L87 Difference]: Start difference. First operand 876 states and 2423 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21:16:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:34,566 INFO L93 Difference]: Finished difference Result 1258 states and 3155 transitions. [2022-03-15 21:16:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:16:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 19 [2022-03-15 21:16:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:34,568 INFO L225 Difference]: With dead ends: 1258 [2022-03-15 21:16:34,568 INFO L226 Difference]: Without dead ends: 1258 [2022-03-15 21:16:34,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:34,568 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 50 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:34,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-03-15 21:16:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 907. [2022-03-15 21:16:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.794701986754967) internal successors, (2532), 906 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2532 transitions. [2022-03-15 21:16:34,579 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2532 transitions. Word has length 19 [2022-03-15 21:16:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:34,579 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 2532 transitions. [2022-03-15 21:16:34,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21:16:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2532 transitions. [2022-03-15 21:16:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:34,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:34,580 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:34,606 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 21:16:34,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:34,796 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash -359113020, now seen corresponding path program 62 times [2022-03-15 21:16:34,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:34,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229176917] [2022-03-15 21:16:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:34,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:34,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229176917] [2022-03-15 21:16:34,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229176917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:34,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878592071] [2022-03-15 21:16:34,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:34,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:34,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:34,848 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 21:16:34,849 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 21:16:34,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:34,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:16:34,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:16:34,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878592071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:34,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:34,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 17 [2022-03-15 21:16:34,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [765816505] [2022-03-15 21:16:34,955 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:34,956 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:34,958 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 47 transitions. [2022-03-15 21:16:34,958 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:35,139 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [118838#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 118844#(< i1 (* 2 N)), 118848#(<= (* 2 N) (+ 3 i2)), 118839#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 118841#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 118845#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 118840#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 118837#(< i2 (* 2 N)), 118842#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 118847#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 118843#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 118846#(or (< i1 (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:16:35,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:16:35,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:16:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:16:35,139 INFO L87 Difference]: Start difference. First operand 907 states and 2532 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) 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 21:16:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:36,055 INFO L93 Difference]: Finished difference Result 1355 states and 3417 transitions. [2022-03-15 21:16:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 21:16:36,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) 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 19 [2022-03-15 21:16:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:36,057 INFO L225 Difference]: With dead ends: 1355 [2022-03-15 21:16:36,057 INFO L226 Difference]: Without dead ends: 1307 [2022-03-15 21:16:36,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1172, Invalid=5148, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:16:36,059 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 167 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:36,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-03-15 21:16:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 877. [2022-03-15 21:16:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 2.7625570776255706) internal successors, (2420), 876 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2420 transitions. [2022-03-15 21:16:36,071 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2420 transitions. Word has length 19 [2022-03-15 21:16:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:36,072 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 2420 transitions. [2022-03-15 21:16:36,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) 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 21:16:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2420 transitions. [2022-03-15 21:16:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:36,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:36,073 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:36,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:36,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 21:16:36,287 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1129736729, now seen corresponding path program 63 times [2022-03-15 21:16:36,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:36,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138800905] [2022-03-15 21:16:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:36,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:36,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:36,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138800905] [2022-03-15 21:16:36,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138800905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:36,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916468088] [2022-03-15 21:16:36,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:36,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:36,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:36,360 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 21:16:36,361 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 21:16:36,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:16:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:36,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:36,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:36,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:36,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916468088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:36,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:36,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 17 [2022-03-15 21:16:36,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1683849206] [2022-03-15 21:16:36,552 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:36,553 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:36,555 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 43 transitions. [2022-03-15 21:16:36,555 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:36,690 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [122185#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 122184#(< i2 (* 2 N)), 122188#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 122187#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 122186#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 122189#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:16:36,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:16:36,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:36,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:16:36,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:16:36,690 INFO L87 Difference]: Start difference. First operand 877 states and 2420 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21:16:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:38,178 INFO L93 Difference]: Finished difference Result 1828 states and 4272 transitions. [2022-03-15 21:16:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 21:16:38,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21:16:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:38,180 INFO L225 Difference]: With dead ends: 1828 [2022-03-15 21:16:38,180 INFO L226 Difference]: Without dead ends: 1828 [2022-03-15 21:16:38,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2453, Invalid=11119, Unknown=0, NotChecked=0, Total=13572 [2022-03-15 21:16:38,186 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 212 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:38,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-03-15 21:16:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 983. [2022-03-15 21:16:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 2.7708757637474544) internal successors, (2721), 982 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 2721 transitions. [2022-03-15 21:16:38,201 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 2721 transitions. Word has length 19 [2022-03-15 21:16:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:38,201 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 2721 transitions. [2022-03-15 21:16:38,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21:16:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 2721 transitions. [2022-03-15 21:16:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:38,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:38,202 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:38,218 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 21:16:38,418 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,SelfDestructingSolverStorable65 [2022-03-15 21:16:38,418 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:38,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash -395892407, now seen corresponding path program 64 times [2022-03-15 21:16:38,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:38,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734926478] [2022-03-15 21:16:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:38,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:38,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734926478] [2022-03-15 21:16:38,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734926478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:38,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408192715] [2022-03-15 21:16:38,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:38,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:38,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:38,459 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 21:16:38,460 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 21:16:38,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:38,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:38,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:38,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:38,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408192715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:38,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:38,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 19 [2022-03-15 21:16:38,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [461311486] [2022-03-15 21:16:38,595 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:38,596 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:38,598 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:16:38,598 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:38,662 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [126302#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 126298#(< i2 (* 2 N)), 126300#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 126299#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 126301#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N)))] [2022-03-15 21:16:38,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:16:38,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:38,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:16:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:38,662 INFO L87 Difference]: Start difference. First operand 983 states and 2721 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:38,774 INFO L93 Difference]: Finished difference Result 1226 states and 3096 transitions. [2022-03-15 21:16:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:16:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:16:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:38,776 INFO L225 Difference]: With dead ends: 1226 [2022-03-15 21:16:38,776 INFO L226 Difference]: Without dead ends: 1226 [2022-03-15 21:16:38,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:16:38,776 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 43 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:38,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-03-15 21:16:38,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 990. [2022-03-15 21:16:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 2.7532861476238626) internal successors, (2723), 989 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 2723 transitions. [2022-03-15 21:16:38,787 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 2723 transitions. Word has length 19 [2022-03-15 21:16:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:38,787 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 2723 transitions. [2022-03-15 21:16:38,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 2723 transitions. [2022-03-15 21:16:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:38,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:38,789 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:38,804 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 21:16:39,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:39,004 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:39,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1675266499, now seen corresponding path program 65 times [2022-03-15 21:16:39,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:39,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307371871] [2022-03-15 21:16:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:39,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:39,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:39,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307371871] [2022-03-15 21:16:39,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307371871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:39,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598823948] [2022-03-15 21:16:39,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:39,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:39,071 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 21:16:39,072 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 21:16:39,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:16:39,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:39,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:39,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:39,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:39,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598823948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:39,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:39,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 18 [2022-03-15 21:16:39,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340625496] [2022-03-15 21:16:39,206 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:39,207 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:39,210 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:16:39,211 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:39,264 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [129655#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 129656#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 129654#(< i2 (* 2 N)), 129657#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N)))] [2022-03-15 21:16:39,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:16:39,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:16:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:16:39,264 INFO L87 Difference]: Start difference. First operand 990 states and 2723 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:39,365 INFO L93 Difference]: Finished difference Result 1317 states and 3254 transitions. [2022-03-15 21:16:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:16:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:16:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:39,367 INFO L225 Difference]: With dead ends: 1317 [2022-03-15 21:16:39,367 INFO L226 Difference]: Without dead ends: 1317 [2022-03-15 21:16:39,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:16:39,367 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:39,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-03-15 21:16:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 998. [2022-03-15 21:16:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.744232698094283) internal successors, (2736), 997 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2736 transitions. [2022-03-15 21:16:39,379 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2736 transitions. Word has length 19 [2022-03-15 21:16:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:39,379 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2736 transitions. [2022-03-15 21:16:39,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2736 transitions. [2022-03-15 21:16:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:39,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:39,381 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:39,397 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 21:16:39,595 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,SelfDestructingSolverStorable67 [2022-03-15 21:16:39,595 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2137247223, now seen corresponding path program 66 times [2022-03-15 21:16:39,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:39,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423183069] [2022-03-15 21:16:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:39,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:39,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:39,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423183069] [2022-03-15 21:16:39,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423183069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:39,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502779606] [2022-03-15 21:16:39,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:39,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:39,640 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 21:16:39,641 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 21:16:39,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:16:39,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:39,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:39,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:39,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:39,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502779606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:39,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:39,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 18 [2022-03-15 21:16:39,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1593692260] [2022-03-15 21:16:39,793 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:39,794 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:39,796 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:16:39,797 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:39,838 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [133112#(< i2 (* 2 N)), 133114#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 133113#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:16:39,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:16:39,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:16:39,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:39,838 INFO L87 Difference]: Start difference. First operand 998 states and 2736 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:16:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:39,927 INFO L93 Difference]: Finished difference Result 1404 states and 3426 transitions. [2022-03-15 21:16:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:16:39,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 19 [2022-03-15 21:16:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:39,929 INFO L225 Difference]: With dead ends: 1404 [2022-03-15 21:16:39,929 INFO L226 Difference]: Without dead ends: 1404 [2022-03-15 21:16:39,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:16:39,930 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:39,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-15 21:16:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1009. [2022-03-15 21:16:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.740079365079365) internal successors, (2762), 1008 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2762 transitions. [2022-03-15 21:16:39,966 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2762 transitions. Word has length 19 [2022-03-15 21:16:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:39,966 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2762 transitions. [2022-03-15 21:16:39,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:16:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2762 transitions. [2022-03-15 21:16:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:39,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:39,967 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:39,983 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 21:16:40,182 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,SelfDestructingSolverStorable68 [2022-03-15 21:16:40,183 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1619093763, now seen corresponding path program 67 times [2022-03-15 21:16:40,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:40,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793354274] [2022-03-15 21:16:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:40,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:40,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:40,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793354274] [2022-03-15 21:16:40,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793354274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:40,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937335905] [2022-03-15 21:16:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:40,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:40,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:40,219 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 21:16:40,219 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 21:16:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:16:40,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:40,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:40,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937335905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:40,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:40,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2022-03-15 21:16:40,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1012405792] [2022-03-15 21:16:40,409 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:40,410 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:40,412 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 33 transitions. [2022-03-15 21:16:40,413 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:40,441 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [136674#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 136673#(< i2 (* 2 N))] [2022-03-15 21:16:40,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:40,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:40,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:16:40,442 INFO L87 Difference]: Start difference. First operand 1009 states and 2762 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 21:16:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:40,500 INFO L93 Difference]: Finished difference Result 1435 states and 3483 transitions. [2022-03-15 21:16:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:16:40,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 19 [2022-03-15 21:16:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:40,502 INFO L225 Difference]: With dead ends: 1435 [2022-03-15 21:16:40,502 INFO L226 Difference]: Without dead ends: 1435 [2022-03-15 21:16:40,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:16:40,503 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:40,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:16:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-03-15 21:16:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1017. [2022-03-15 21:16:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.7421259842519685) internal successors, (2786), 1016 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 2786 transitions. [2022-03-15 21:16:40,516 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 2786 transitions. Word has length 19 [2022-03-15 21:16:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:40,516 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 2786 transitions. [2022-03-15 21:16:40,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 21:16:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 2786 transitions. [2022-03-15 21:16:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:40,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:40,517 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:40,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 21:16:40,720 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,SelfDestructingSolverStorable69 [2022-03-15 21:16:40,720 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:40,721 INFO L85 PathProgramCache]: Analyzing trace with hash -388640502, now seen corresponding path program 68 times [2022-03-15 21:16:40,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:40,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12341760] [2022-03-15 21:16:40,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:40,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:40,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:40,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12341760] [2022-03-15 21:16:40,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12341760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:40,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356102292] [2022-03-15 21:16:40,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:40,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:40,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:40,800 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 21:16:40,827 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 21:16:40,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:40,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:40,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:16:40,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:16:40,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:16:40,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356102292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:40,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:40,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2022-03-15 21:16:40,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [617852270] [2022-03-15 21:16:40,949 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:40,961 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:40,964 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 61 transitions. [2022-03-15 21:16:40,964 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:41,224 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [140289#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 140281#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 140287#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 140276#(< i1 (* 2 N)), 140288#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 140278#(< i2 (* 2 N)), 140282#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 140283#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 140279#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 140277#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 140280#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 140285#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 140284#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 140286#(<= (* 2 N) (+ i2 4))] [2022-03-15 21:16:41,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:16:41,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:16:41,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:16:41,224 INFO L87 Difference]: Start difference. First operand 1017 states and 2786 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) 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 21:16:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:42,265 INFO L93 Difference]: Finished difference Result 2434 states and 5910 transitions. [2022-03-15 21:16:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 21:16:42,266 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) 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 19 [2022-03-15 21:16:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:42,268 INFO L225 Difference]: With dead ends: 2434 [2022-03-15 21:16:42,269 INFO L226 Difference]: Without dead ends: 2285 [2022-03-15 21:16:42,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1922, Invalid=8998, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 21:16:42,270 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 275 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:42,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 1 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:16:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2022-03-15 21:16:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1492. [2022-03-15 21:16:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 2.722334004024145) internal successors, (4059), 1491 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4059 transitions. [2022-03-15 21:16:42,289 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4059 transitions. Word has length 19 [2022-03-15 21:16:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:42,289 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 4059 transitions. [2022-03-15 21:16:42,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) 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 21:16:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4059 transitions. [2022-03-15 21:16:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:16:42,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:42,291 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:42,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:42,506 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,SelfDestructingSolverStorable70 [2022-03-15 21:16:42,506 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1878813385, now seen corresponding path program 69 times [2022-03-15 21:16:42,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:42,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305679422] [2022-03-15 21:16:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:42,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:42,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305679422] [2022-03-15 21:16:42,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305679422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:42,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372245457] [2022-03-15 21:16:42,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:42,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:42,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:42,563 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 21:16:42,564 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 21:16:42,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:16:42,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:16:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-15 21:16:42,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-15 21:16:42,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372245457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:42,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:42,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 16 [2022-03-15 21:16:42,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [967525626] [2022-03-15 21:16:42,678 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:42,679 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:42,682 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 59 transitions. [2022-03-15 21:16:42,682 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:42,857 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [145985#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 145982#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 145983#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 145979#(< i2 (* 2 N)), 145980#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 145981#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 145984#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:16:42,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:16:42,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:42,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:16:42,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:16:42,857 INFO L87 Difference]: Start difference. First operand 1492 states and 4059 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 21:16:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:45,187 INFO L93 Difference]: Finished difference Result 2811 states and 6493 transitions. [2022-03-15 21:16:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-15 21:16:45,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 19 [2022-03-15 21:16:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:45,191 INFO L225 Difference]: With dead ends: 2811 [2022-03-15 21:16:45,191 INFO L226 Difference]: Without dead ends: 2811 [2022-03-15 21:16:45,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2820, Invalid=17772, Unknown=0, NotChecked=0, Total=20592 [2022-03-15 21:16:45,192 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 241 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:45,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:16:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-03-15 21:16:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1642. [2022-03-15 21:16:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 2.7361365021328456) internal successors, (4490), 1641 states have internal predecessors, (4490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 4490 transitions. [2022-03-15 21:16:45,213 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 4490 transitions. Word has length 19 [2022-03-15 21:16:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:45,213 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 4490 transitions. [2022-03-15 21:16:45,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 21:16:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 4490 transitions. [2022-03-15 21:16:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:45,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:45,215 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:45,231 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 21:16:45,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:45,430 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1767870179, now seen corresponding path program 70 times [2022-03-15 21:16:45,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:45,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276044540] [2022-03-15 21:16:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:45,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:45,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276044540] [2022-03-15 21:16:45,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276044540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:45,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517526932] [2022-03-15 21:16:45,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:45,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:45,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:45,505 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 21:16:45,519 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 21:16:45,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:45,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:45,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:45,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:45,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:45,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517526932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:45,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:45,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-15 21:16:45,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1046124198] [2022-03-15 21:16:45,674 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:45,675 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:45,678 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:16:45,678 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:45,818 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [152468#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 152469#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 152470#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 152467#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 152465#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 152466#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 152464#(< i2 (* 2 N))] [2022-03-15 21:16:45,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:16:45,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:16:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:16:45,819 INFO L87 Difference]: Start difference. First operand 1642 states and 4490 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 21:16:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:46,060 INFO L93 Difference]: Finished difference Result 2764 states and 7126 transitions. [2022-03-15 21:16:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:16:46,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 21:16:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:46,064 INFO L225 Difference]: With dead ends: 2764 [2022-03-15 21:16:46,064 INFO L226 Difference]: Without dead ends: 2757 [2022-03-15 21:16:46,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:16:46,065 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 228 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:46,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2022-03-15 21:16:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2003. [2022-03-15 21:16:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 2.801698301698302) internal successors, (5609), 2002 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 5609 transitions. [2022-03-15 21:16:46,092 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 5609 transitions. Word has length 21 [2022-03-15 21:16:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:46,092 INFO L470 AbstractCegarLoop]: Abstraction has 2003 states and 5609 transitions. [2022-03-15 21:16:46,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 21:16:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 5609 transitions. [2022-03-15 21:16:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:46,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:46,095 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:46,110 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 21:16:46,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:46,310 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash -40294045, now seen corresponding path program 71 times [2022-03-15 21:16:46,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:46,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947698192] [2022-03-15 21:16:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:46,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:46,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947698192] [2022-03-15 21:16:46,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947698192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:46,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259822200] [2022-03-15 21:16:46,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:46,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:46,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:46,355 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 21:16:46,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:16:46,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:46,399 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 21:16:46,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:46,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:46,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259822200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:46,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:46,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 19 [2022-03-15 21:16:46,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [280255253] [2022-03-15 21:16:46,588 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:46,589 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:46,591 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2022-03-15 21:16:46,591 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:46,607 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [159411#(< i2 (* 2 N))] [2022-03-15 21:16:46,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:46,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:46,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:46,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:46,608 INFO L87 Difference]: Start difference. First operand 2003 states and 5609 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:46,742 INFO L93 Difference]: Finished difference Result 2568 states and 6618 transitions. [2022-03-15 21:16:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:16:46,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:16:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:46,746 INFO L225 Difference]: With dead ends: 2568 [2022-03-15 21:16:46,746 INFO L226 Difference]: Without dead ends: 2567 [2022-03-15 21:16:46,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=508, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:16:46,746 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:46,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2022-03-15 21:16:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2027. [2022-03-15 21:16:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 2.8000987166831193) internal successors, (5673), 2026 states have internal predecessors, (5673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 5673 transitions. [2022-03-15 21:16:46,773 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 5673 transitions. Word has length 21 [2022-03-15 21:16:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:46,773 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 5673 transitions. [2022-03-15 21:16:46,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 5673 transitions. [2022-03-15 21:16:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:46,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:46,775 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:46,791 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 21:16:46,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:46,988 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash -538995385, now seen corresponding path program 72 times [2022-03-15 21:16:46,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:46,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116804527] [2022-03-15 21:16:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:47,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:47,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116804527] [2022-03-15 21:16:47,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116804527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:47,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018323502] [2022-03-15 21:16:47,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:47,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:47,065 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 21:16:47,066 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 21:16:47,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:16:47,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:47,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:47,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:47,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:47,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018323502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:47,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:47,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:16:47,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2015426414] [2022-03-15 21:16:47,289 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:47,290 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:47,292 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:16:47,292 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:47,348 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [166191#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:47,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:47,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:47,349 INFO L87 Difference]: Start difference. First operand 2027 states and 5673 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:47,511 INFO L93 Difference]: Finished difference Result 3022 states and 7564 transitions. [2022-03-15 21:16:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:16:47,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:16:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:47,515 INFO L225 Difference]: With dead ends: 3022 [2022-03-15 21:16:47,515 INFO L226 Difference]: Without dead ends: 3022 [2022-03-15 21:16:47,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:16:47,515 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 85 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:47,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2022-03-15 21:16:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2031. [2022-03-15 21:16:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.8004926108374386) internal successors, (5685), 2030 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5685 transitions. [2022-03-15 21:16:47,544 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5685 transitions. Word has length 21 [2022-03-15 21:16:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:47,544 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 5685 transitions. [2022-03-15 21:16:47,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5685 transitions. [2022-03-15 21:16:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:47,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:47,546 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:47,562 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 21:16:47,759 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,SelfDestructingSolverStorable74 [2022-03-15 21:16:47,759 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1232649769, now seen corresponding path program 73 times [2022-03-15 21:16:47,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:47,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501284477] [2022-03-15 21:16:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:47,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:47,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:47,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501284477] [2022-03-15 21:16:47,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501284477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:47,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434783324] [2022-03-15 21:16:47,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:47,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:47,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:47,817 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 21:16:47,818 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 21:16:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:47,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:47,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434783324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:47,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:47,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 18 [2022-03-15 21:16:47,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [54476130] [2022-03-15 21:16:47,974 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:47,975 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:47,978 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:16:47,978 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:48,011 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [173436#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 173435#(< i2 (* 2 N))] [2022-03-15 21:16:48,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:48,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:48,012 INFO L87 Difference]: Start difference. First operand 2031 states and 5685 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:48,135 INFO L93 Difference]: Finished difference Result 2518 states and 6577 transitions. [2022-03-15 21:16:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:16:48,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:16:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:48,139 INFO L225 Difference]: With dead ends: 2518 [2022-03-15 21:16:48,139 INFO L226 Difference]: Without dead ends: 2516 [2022-03-15 21:16:48,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:16:48,140 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 95 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:48,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-03-15 21:16:48,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2082. [2022-03-15 21:16:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 2.8169149447381066) internal successors, (5862), 2081 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 5862 transitions. [2022-03-15 21:16:48,172 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 5862 transitions. Word has length 21 [2022-03-15 21:16:48,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:48,172 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 5862 transitions. [2022-03-15 21:16:48,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:48,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 5862 transitions. [2022-03-15 21:16:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:48,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:48,175 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:48,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:48,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:48,390 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:48,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2086892381, now seen corresponding path program 74 times [2022-03-15 21:16:48,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:48,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178219318] [2022-03-15 21:16:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:48,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:48,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:48,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178219318] [2022-03-15 21:16:48,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178219318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:48,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616514594] [2022-03-15 21:16:48,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:48,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:48,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:48,436 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 21:16:48,436 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 21:16:48,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:48,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:48,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:48,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:48,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616514594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:48,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:48,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 19 [2022-03-15 21:16:48,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1273600902] [2022-03-15 21:16:48,640 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:48,641 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:48,643 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2022-03-15 21:16:48,644 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:48,653 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [180275#(< i2 (* 2 N))] [2022-03-15 21:16:48,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:48,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:48,654 INFO L87 Difference]: Start difference. First operand 2082 states and 5862 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:48,761 INFO L93 Difference]: Finished difference Result 2879 states and 7368 transitions. [2022-03-15 21:16:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:16:48,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:16:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:48,765 INFO L225 Difference]: With dead ends: 2879 [2022-03-15 21:16:48,765 INFO L226 Difference]: Without dead ends: 2876 [2022-03-15 21:16:48,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=352, Invalid=578, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:16:48,766 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 102 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:48,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-03-15 21:16:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2069. [2022-03-15 21:16:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.7940038684719535) internal successors, (5778), 2068 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5778 transitions. [2022-03-15 21:16:48,794 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5778 transitions. Word has length 21 [2022-03-15 21:16:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:48,794 INFO L470 AbstractCegarLoop]: Abstraction has 2069 states and 5778 transitions. [2022-03-15 21:16:48,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5778 transitions. [2022-03-15 21:16:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:48,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:48,797 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:48,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:49,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:49,011 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:49,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1709373575, now seen corresponding path program 75 times [2022-03-15 21:16:49,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:49,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001361089] [2022-03-15 21:16:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:49,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:49,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:49,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001361089] [2022-03-15 21:16:49,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001361089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:49,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996730950] [2022-03-15 21:16:49,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:49,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:49,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:49,067 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 21:16:49,068 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 21:16:49,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:16:49,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:49,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:49,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:49,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996730950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:49,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:49,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:16:49,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [429364999] [2022-03-15 21:16:49,258 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:49,259 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:49,261 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:16:49,261 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:49,292 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [187454#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:49,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:49,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:49,293 INFO L87 Difference]: Start difference. First operand 2069 states and 5778 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:49,398 INFO L93 Difference]: Finished difference Result 2793 states and 7023 transitions. [2022-03-15 21:16:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:16:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:16:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:49,402 INFO L225 Difference]: With dead ends: 2793 [2022-03-15 21:16:49,402 INFO L226 Difference]: Without dead ends: 2793 [2022-03-15 21:16:49,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:16:49,403 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:49,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2022-03-15 21:16:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2036. [2022-03-15 21:16:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 2.7813267813267815) internal successors, (5660), 2035 states have internal predecessors, (5660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 5660 transitions. [2022-03-15 21:16:49,432 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 5660 transitions. Word has length 21 [2022-03-15 21:16:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:49,432 INFO L470 AbstractCegarLoop]: Abstraction has 2036 states and 5660 transitions. [2022-03-15 21:16:49,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 5660 transitions. [2022-03-15 21:16:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:49,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:49,443 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:49,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:49,658 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,SelfDestructingSolverStorable77 [2022-03-15 21:16:49,659 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash 854066921, now seen corresponding path program 76 times [2022-03-15 21:16:49,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:49,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135694572] [2022-03-15 21:16:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:49,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:49,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135694572] [2022-03-15 21:16:49,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135694572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:49,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855665866] [2022-03-15 21:16:49,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:49,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:49,724 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 21:16:49,725 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 21:16:49,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:49,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:49,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855665866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:49,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:49,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 20 [2022-03-15 21:16:49,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [80718978] [2022-03-15 21:16:49,914 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:49,915 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:49,917 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:16:49,917 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:49,995 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [194482#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 194481#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:49,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:16:49,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:16:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:16:49,996 INFO L87 Difference]: Start difference. First operand 2036 states and 5660 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:16:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:50,225 INFO L93 Difference]: Finished difference Result 2997 states and 7491 transitions. [2022-03-15 21:16:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:16:50,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21 [2022-03-15 21:16:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:50,230 INFO L225 Difference]: With dead ends: 2997 [2022-03-15 21:16:50,230 INFO L226 Difference]: Without dead ends: 2997 [2022-03-15 21:16:50,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:16:50,230 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 114 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:50,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2022-03-15 21:16:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2047. [2022-03-15 21:16:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 2.7825024437927666) internal successors, (5693), 2046 states have internal predecessors, (5693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 5693 transitions. [2022-03-15 21:16:50,260 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 5693 transitions. Word has length 21 [2022-03-15 21:16:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:50,260 INFO L470 AbstractCegarLoop]: Abstraction has 2047 states and 5693 transitions. [2022-03-15 21:16:50,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:16:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 5693 transitions. [2022-03-15 21:16:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:50,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:50,263 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:50,278 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 21:16:50,478 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,SelfDestructingSolverStorable78 [2022-03-15 21:16:50,478 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:50,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:50,479 INFO L85 PathProgramCache]: Analyzing trace with hash -471415545, now seen corresponding path program 77 times [2022-03-15 21:16:50,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:50,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151708975] [2022-03-15 21:16:50,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:50,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:50,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:50,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151708975] [2022-03-15 21:16:50,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151708975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:50,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293194748] [2022-03-15 21:16:50,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:50,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:50,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:50,528 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 21:16:50,529 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 21:16:50,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:16:50,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:50,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:50,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293194748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:50,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:50,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 19 [2022-03-15 21:16:50,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [646753582] [2022-03-15 21:16:50,667 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:50,668 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:50,670 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:16:50,670 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:50,691 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [201742#(< i2 (* 2 N)), 201743#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:16:50,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:50,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:50,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:50,692 INFO L87 Difference]: Start difference. First operand 2047 states and 5693 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:50,790 INFO L93 Difference]: Finished difference Result 2680 states and 6900 transitions. [2022-03-15 21:16:50,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:16:50,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:16:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:50,794 INFO L225 Difference]: With dead ends: 2680 [2022-03-15 21:16:50,794 INFO L226 Difference]: Without dead ends: 2678 [2022-03-15 21:16:50,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=353, Invalid=639, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:16:50,795 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:50,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:16:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2022-03-15 21:16:50,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2095. [2022-03-15 21:16:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2094 states have (on average 2.7956064947468957) internal successors, (5854), 2094 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 5854 transitions. [2022-03-15 21:16:50,824 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 5854 transitions. Word has length 21 [2022-03-15 21:16:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:50,824 INFO L470 AbstractCegarLoop]: Abstraction has 2095 states and 5854 transitions. [2022-03-15 21:16:50,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 5854 transitions. [2022-03-15 21:16:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:50,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:50,827 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:50,843 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 21:16:51,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:51,040 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:51,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1106931357, now seen corresponding path program 78 times [2022-03-15 21:16:51,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:51,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574366513] [2022-03-15 21:16:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:51,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:51,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:51,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574366513] [2022-03-15 21:16:51,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574366513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:51,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707276601] [2022-03-15 21:16:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:51,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:51,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:51,100 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 21:16:51,101 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 21:16:51,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:16:51,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:51,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:51,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:51,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707276601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:51,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:51,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 19 [2022-03-15 21:16:51,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [426400731] [2022-03-15 21:16:51,262 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:51,264 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:51,266 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2022-03-15 21:16:51,266 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:51,274 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [208774#(< i2 (* 2 N))] [2022-03-15 21:16:51,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:51,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:51,274 INFO L87 Difference]: Start difference. First operand 2095 states and 5854 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:51,379 INFO L93 Difference]: Finished difference Result 3033 states and 7694 transitions. [2022-03-15 21:16:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:16:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:16:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:51,383 INFO L225 Difference]: With dead ends: 3033 [2022-03-15 21:16:51,384 INFO L226 Difference]: Without dead ends: 3029 [2022-03-15 21:16:51,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:16:51,384 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 68 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:51,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:16:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-03-15 21:16:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2092. [2022-03-15 21:16:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.7828790052606407) internal successors, (5819), 2091 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5819 transitions. [2022-03-15 21:16:51,414 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5819 transitions. Word has length 21 [2022-03-15 21:16:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:51,414 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 5819 transitions. [2022-03-15 21:16:51,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5819 transitions. [2022-03-15 21:16:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:51,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:51,417 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:51,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:51,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:51,633 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:51,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1605632697, now seen corresponding path program 79 times [2022-03-15 21:16:51,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:51,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985740371] [2022-03-15 21:16:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:51,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:51,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:51,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985740371] [2022-03-15 21:16:51,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985740371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:51,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040716655] [2022-03-15 21:16:51,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:51,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:51,666 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 21:16:51,667 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 21:16:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:51,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:51,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040716655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:51,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:51,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:16:51,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [977958537] [2022-03-15 21:16:51,851 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:51,852 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:51,854 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:16:51,854 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:51,891 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [216157#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:51,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:51,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:51,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:51,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:51,892 INFO L87 Difference]: Start difference. First operand 2092 states and 5819 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:52,078 INFO L93 Difference]: Finished difference Result 3090 states and 7696 transitions. [2022-03-15 21:16:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:16:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:16:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:52,082 INFO L225 Difference]: With dead ends: 3090 [2022-03-15 21:16:52,082 INFO L226 Difference]: Without dead ends: 3086 [2022-03-15 21:16:52,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=735, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:16:52,082 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:52,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2022-03-15 21:16:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 2070. [2022-03-15 21:16:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 2.778637022716288) internal successors, (5749), 2069 states have internal predecessors, (5749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 5749 transitions. [2022-03-15 21:16:52,111 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 5749 transitions. Word has length 21 [2022-03-15 21:16:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:52,111 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 5749 transitions. [2022-03-15 21:16:52,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 5749 transitions. [2022-03-15 21:16:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:52,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:52,114 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:52,129 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 21:16:52,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-15 21:16:52,326 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1834027945, now seen corresponding path program 80 times [2022-03-15 21:16:52,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:52,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548529670] [2022-03-15 21:16:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:52,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:52,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548529670] [2022-03-15 21:16:52,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548529670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:52,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472931754] [2022-03-15 21:16:52,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:52,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:52,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:52,385 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 21:16:52,386 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 21:16:52,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:52,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:52,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:52,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:52,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:52,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472931754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:52,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:52,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14] total 21 [2022-03-15 21:16:52,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1046544834] [2022-03-15 21:16:52,607 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:52,608 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:52,610 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:16:52,610 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:52,687 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [223555#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 223554#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:16:52,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:16:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:16:52,688 INFO L87 Difference]: Start difference. First operand 2070 states and 5749 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:16:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:52,895 INFO L93 Difference]: Finished difference Result 2721 states and 6837 transitions. [2022-03-15 21:16:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:16:52,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21 [2022-03-15 21:16:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:52,899 INFO L225 Difference]: With dead ends: 2721 [2022-03-15 21:16:52,899 INFO L226 Difference]: Without dead ends: 2721 [2022-03-15 21:16:52,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=966, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:16:52,899 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 90 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:52,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-03-15 21:16:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2021. [2022-03-15 21:16:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2020 states have (on average 2.759405940594059) internal successors, (5574), 2020 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 5574 transitions. [2022-03-15 21:16:52,924 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 5574 transitions. Word has length 21 [2022-03-15 21:16:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:52,924 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 5574 transitions. [2022-03-15 21:16:52,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:16:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 5574 transitions. [2022-03-15 21:16:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:52,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:52,927 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:52,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 21:16:53,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:53,135 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:53,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1089325447, now seen corresponding path program 81 times [2022-03-15 21:16:53,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:53,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380322005] [2022-03-15 21:16:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:53,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:53,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:53,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380322005] [2022-03-15 21:16:53,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380322005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:53,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378872294] [2022-03-15 21:16:53,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:53,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:53,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:53,191 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 21:16:53,198 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 21:16:53,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:16:53,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:53,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:53,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:53,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378872294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:53,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:53,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 21 [2022-03-15 21:16:53,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [764242789] [2022-03-15 21:16:53,351 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:53,353 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:53,355 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:16:53,355 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:53,423 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [230491#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 230489#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 230490#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:16:53,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:16:53,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:53,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:16:53,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:53,424 INFO L87 Difference]: Start difference. First operand 2021 states and 5574 transitions. Second operand has 16 states, 16 states have (on average 2.0) 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 21:16:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:53,683 INFO L93 Difference]: Finished difference Result 2882 states and 7219 transitions. [2022-03-15 21:16:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:16:53,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) 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 21 [2022-03-15 21:16:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:53,687 INFO L225 Difference]: With dead ends: 2882 [2022-03-15 21:16:53,687 INFO L226 Difference]: Without dead ends: 2882 [2022-03-15 21:16:53,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=732, Invalid=1818, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:16:53,688 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 130 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:53,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2022-03-15 21:16:53,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2039. [2022-03-15 21:16:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 2.7610402355250248) internal successors, (5627), 2038 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 5627 transitions. [2022-03-15 21:16:53,739 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 5627 transitions. Word has length 21 [2022-03-15 21:16:53,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:53,739 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 5627 transitions. [2022-03-15 21:16:53,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) 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 21:16:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 5627 transitions. [2022-03-15 21:16:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:53,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:53,757 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:53,772 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 21:16:53,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:53,972 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1757832727, now seen corresponding path program 82 times [2022-03-15 21:16:53,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:53,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420170856] [2022-03-15 21:16:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:54,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:54,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420170856] [2022-03-15 21:16:54,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420170856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:54,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50281936] [2022-03-15 21:16:54,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:54,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:54,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:54,027 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 21:16:54,028 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 21:16:54,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:54,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:16:54,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:54,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50281936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:54,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:54,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 18 [2022-03-15 21:16:54,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1726141086] [2022-03-15 21:16:54,176 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:54,177 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:54,180 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:16:54,180 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:54,199 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [237644#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 237643#(< i2 (* 2 N))] [2022-03-15 21:16:54,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:54,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:54,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:54,200 INFO L87 Difference]: Start difference. First operand 2039 states and 5627 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:54,300 INFO L93 Difference]: Finished difference Result 2709 states and 6933 transitions. [2022-03-15 21:16:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:16:54,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:16:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:54,303 INFO L225 Difference]: With dead ends: 2709 [2022-03-15 21:16:54,303 INFO L226 Difference]: Without dead ends: 2705 [2022-03-15 21:16:54,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=374, Invalid=682, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:16:54,303 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 79 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:54,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:16:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-03-15 21:16:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1958. [2022-03-15 21:16:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.743995912110373) internal successors, (5370), 1957 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5370 transitions. [2022-03-15 21:16:54,327 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5370 transitions. Word has length 21 [2022-03-15 21:16:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:54,327 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 5370 transitions. [2022-03-15 21:16:54,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5370 transitions. [2022-03-15 21:16:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:54,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:54,329 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:54,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 21:16:54,536 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,SelfDestructingSolverStorable84 [2022-03-15 21:16:54,537 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash -792910685, now seen corresponding path program 83 times [2022-03-15 21:16:54,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:54,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722478469] [2022-03-15 21:16:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:54,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:54,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722478469] [2022-03-15 21:16:54,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722478469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:54,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138383337] [2022-03-15 21:16:54,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:54,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:54,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:54,588 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 21:16:54,627 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 21:16:54,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:16:54,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:54,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:54,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:54,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:54,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138383337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:54,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:54,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 19 [2022-03-15 21:16:54,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1414982068] [2022-03-15 21:16:54,765 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:54,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:54,768 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2022-03-15 21:16:54,768 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:54,788 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [244434#(< i2 (* 2 N))] [2022-03-15 21:16:54,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:16:54,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:16:54,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:16:54,789 INFO L87 Difference]: Start difference. First operand 1958 states and 5370 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:54,974 INFO L93 Difference]: Finished difference Result 2839 states and 7076 transitions. [2022-03-15 21:16:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:16:54,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:16:54,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:54,978 INFO L225 Difference]: With dead ends: 2839 [2022-03-15 21:16:54,978 INFO L226 Difference]: Without dead ends: 2835 [2022-03-15 21:16:54,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=436, Invalid=754, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:16:54,979 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 80 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:54,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:54,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-03-15 21:16:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1956. [2022-03-15 21:16:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 2.7375959079283887) internal successors, (5352), 1955 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 5352 transitions. [2022-03-15 21:16:55,004 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 5352 transitions. Word has length 21 [2022-03-15 21:16:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:55,004 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 5352 transitions. [2022-03-15 21:16:55,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 5352 transitions. [2022-03-15 21:16:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:55,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:55,006 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:55,022 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 21:16:55,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:55,222 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1291612025, now seen corresponding path program 84 times [2022-03-15 21:16:55,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:55,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881638652] [2022-03-15 21:16:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:55,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:55,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881638652] [2022-03-15 21:16:55,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881638652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:55,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151427997] [2022-03-15 21:16:55,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:16:55,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:55,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:55,279 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 21:16:55,280 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 21:16:55,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:16:55,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:55,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:55,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151427997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:55,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:55,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:16:55,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [863348425] [2022-03-15 21:16:55,484 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:55,485 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:55,487 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:16:55,487 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:55,528 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [251355#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:55,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:16:55,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:16:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:16:55,528 INFO L87 Difference]: Start difference. First operand 1956 states and 5352 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:55,700 INFO L93 Difference]: Finished difference Result 2959 states and 7237 transitions. [2022-03-15 21:16:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:16:55,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:16:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:55,704 INFO L225 Difference]: With dead ends: 2959 [2022-03-15 21:16:55,704 INFO L226 Difference]: Without dead ends: 2955 [2022-03-15 21:16:55,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=785, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:16:55,704 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 82 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:55,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-03-15 21:16:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 1953. [2022-03-15 21:16:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.7366803278688523) internal successors, (5342), 1952 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5342 transitions. [2022-03-15 21:16:55,729 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5342 transitions. Word has length 21 [2022-03-15 21:16:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:55,729 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 5342 transitions. [2022-03-15 21:16:55,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:16:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5342 transitions. [2022-03-15 21:16:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:55,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:55,731 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:55,751 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 21:16:55,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:55,946 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:55,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2146918679, now seen corresponding path program 85 times [2022-03-15 21:16:55,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:55,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855881037] [2022-03-15 21:16:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:55,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:56,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:56,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855881037] [2022-03-15 21:16:56,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855881037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:56,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397889505] [2022-03-15 21:16:56,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:16:56,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:56,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:56,020 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 21:16:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:56,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:56,067 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 21:16:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:56,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:56,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397889505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:56,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:56,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 20 [2022-03-15 21:16:56,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1930648437] [2022-03-15 21:16:56,230 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:56,231 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:56,233 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:16:56,233 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:56,312 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [258388#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 258389#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:16:56,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:16:56,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:16:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:16:56,313 INFO L87 Difference]: Start difference. First operand 1953 states and 5342 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:16:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:56,554 INFO L93 Difference]: Finished difference Result 2817 states and 6913 transitions. [2022-03-15 21:16:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:16:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21 [2022-03-15 21:16:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:56,558 INFO L225 Difference]: With dead ends: 2817 [2022-03-15 21:16:56,558 INFO L226 Difference]: Without dead ends: 2811 [2022-03-15 21:16:56,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:16:56,558 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 92 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:56,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-03-15 21:16:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1938. [2022-03-15 21:16:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.735157459989675) internal successors, (5298), 1937 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 5298 transitions. [2022-03-15 21:16:56,593 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 5298 transitions. Word has length 21 [2022-03-15 21:16:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:56,593 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 5298 transitions. [2022-03-15 21:16:56,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:16:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 5298 transitions. [2022-03-15 21:16:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:56,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:56,596 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:56,611 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 21:16:56,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 21:16:56,811 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1403346119, now seen corresponding path program 86 times [2022-03-15 21:16:56,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:56,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095705748] [2022-03-15 21:16:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:56,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:56,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095705748] [2022-03-15 21:16:56,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095705748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:56,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727679883] [2022-03-15 21:16:56,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:16:56,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:56,875 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 21:16:56,876 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 21:16:56,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:16:56,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:56,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:56,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:56,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 29 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:57,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727679883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:57,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:57,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 21 [2022-03-15 21:16:57,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [198280599] [2022-03-15 21:16:57,066 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:57,067 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:57,070 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:16:57,070 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:57,190 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [265260#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 265261#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 265259#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:16:57,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:16:57,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:57,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:16:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:57,191 INFO L87 Difference]: Start difference. First operand 1938 states and 5298 transitions. Second operand has 16 states, 16 states have (on average 2.0) 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 21:16:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:57,492 INFO L93 Difference]: Finished difference Result 2474 states and 6180 transitions. [2022-03-15 21:16:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:16:57,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) 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 21 [2022-03-15 21:16:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:57,495 INFO L225 Difference]: With dead ends: 2474 [2022-03-15 21:16:57,495 INFO L226 Difference]: Without dead ends: 2474 [2022-03-15 21:16:57,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=683, Invalid=1767, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:16:57,496 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 91 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:57,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-03-15 21:16:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1907. [2022-03-15 21:16:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 2.7266526757607554) internal successors, (5197), 1906 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 5197 transitions. [2022-03-15 21:16:57,518 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 5197 transitions. Word has length 21 [2022-03-15 21:16:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:57,518 INFO L470 AbstractCegarLoop]: Abstraction has 1907 states and 5197 transitions. [2022-03-15 21:16:57,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) 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 21:16:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 5197 transitions. [2022-03-15 21:16:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:57,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:57,520 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:57,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:57,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:57,735 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash -207594839, now seen corresponding path program 87 times [2022-03-15 21:16:57,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:57,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153723208] [2022-03-15 21:16:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:57,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:57,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153723208] [2022-03-15 21:16:57,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153723208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:57,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040032577] [2022-03-15 21:16:57,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:16:57,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:57,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:57,823 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 21:16:57,824 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 21:16:57,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:16:57,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:57,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:57,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:58,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040032577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:58,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:58,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2022-03-15 21:16:58,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [131925644] [2022-03-15 21:16:58,032 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:58,033 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:58,036 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 41 transitions. [2022-03-15 21:16:58,036 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:58,173 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [271745#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 271742#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 271744#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 271743#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:16:58,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:16:58,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:58,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:16:58,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:16:58,173 INFO L87 Difference]: Start difference. First operand 1907 states and 5197 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) 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 21:16:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:58,447 INFO L93 Difference]: Finished difference Result 2547 states and 6366 transitions. [2022-03-15 21:16:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:16:58,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) 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 21 [2022-03-15 21:16:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:58,450 INFO L225 Difference]: With dead ends: 2547 [2022-03-15 21:16:58,450 INFO L226 Difference]: Without dead ends: 2547 [2022-03-15 21:16:58,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=772, Invalid=1984, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:16:58,450 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 148 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:58,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2022-03-15 21:16:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 1841. [2022-03-15 21:16:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 2.7130434782608694) internal successors, (4992), 1840 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 4992 transitions. [2022-03-15 21:16:58,494 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 4992 transitions. Word has length 21 [2022-03-15 21:16:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:58,494 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 4992 transitions. [2022-03-15 21:16:58,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) 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 21:16:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 4992 transitions. [2022-03-15 21:16:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:58,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:58,496 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:58,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 21:16:58,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:58,711 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash -804990365, now seen corresponding path program 88 times [2022-03-15 21:16:58,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:58,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997964970] [2022-03-15 21:16:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:58,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:58,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997964970] [2022-03-15 21:16:58,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997964970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:58,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91129205] [2022-03-15 21:16:58,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:16:58,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:58,773 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 21:16:58,773 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 21:16:58,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:16:58,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:58,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:58,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91129205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:58,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:58,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 19 [2022-03-15 21:16:58,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1283039783] [2022-03-15 21:16:58,943 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:58,944 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:58,946 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 35 transitions. [2022-03-15 21:16:58,946 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:59,032 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [278172#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 278170#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 278169#(< i2 (* 2 N)), 278171#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 278173#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:16:59,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:16:59,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:16:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:59,032 INFO L87 Difference]: Start difference. First operand 1841 states and 4992 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:59,198 INFO L93 Difference]: Finished difference Result 2296 states and 5900 transitions. [2022-03-15 21:16:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:16:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:16:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:59,201 INFO L225 Difference]: With dead ends: 2296 [2022-03-15 21:16:59,202 INFO L226 Difference]: Without dead ends: 2291 [2022-03-15 21:16:59,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=862, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:16:59,202 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 231 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:59,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 1 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:16:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-03-15 21:16:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1910. [2022-03-15 21:16:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.7338920900995287) internal successors, (5219), 1909 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 5219 transitions. [2022-03-15 21:16:59,224 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 5219 transitions. Word has length 21 [2022-03-15 21:16:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:59,224 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 5219 transitions. [2022-03-15 21:16:59,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 5219 transitions. [2022-03-15 21:16:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:59,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:59,226 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:59,241 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 21:16:59,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:59,441 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:16:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:16:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1253307591, now seen corresponding path program 89 times [2022-03-15 21:16:59,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:16:59,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450894760] [2022-03-15 21:16:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:16:59,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:16:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:16:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:59,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:16:59,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450894760] [2022-03-15 21:16:59,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450894760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:16:59,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999648480] [2022-03-15 21:16:59,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:16:59,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:16:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:16:59,511 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 21:16:59,512 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 21:16:59,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:16:59,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:16:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:16:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:16:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:16:59,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:16:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:16:59,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999648480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:16:59,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:16:59,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14] total 20 [2022-03-15 21:16:59,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1321366114] [2022-03-15 21:16:59,683 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:16:59,684 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:16:59,686 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:16:59,686 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:16:59,728 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [284456#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 284454#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 284453#(< i2 (* 2 N)), 284455#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N)))] [2022-03-15 21:16:59,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:16:59,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:16:59,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:16:59,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:16:59,729 INFO L87 Difference]: Start difference. First operand 1910 states and 5219 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:16:59,835 INFO L93 Difference]: Finished difference Result 2328 states and 5938 transitions. [2022-03-15 21:16:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:16:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:16:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:16:59,837 INFO L225 Difference]: With dead ends: 2328 [2022-03-15 21:16:59,838 INFO L226 Difference]: Without dead ends: 2324 [2022-03-15 21:16:59,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:16:59,838 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 81 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:16:59,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:16:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2022-03-15 21:16:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1910. [2022-03-15 21:16:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.7307490832896804) internal successors, (5213), 1909 states have internal predecessors, (5213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 5213 transitions. [2022-03-15 21:16:59,859 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 5213 transitions. Word has length 21 [2022-03-15 21:16:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:16:59,859 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 5213 transitions. [2022-03-15 21:16:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:16:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 5213 transitions. [2022-03-15 21:16:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:16:59,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:16:59,861 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:16:59,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:00,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-15 21:17:00,077 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1042609635, now seen corresponding path program 90 times [2022-03-15 21:17:00,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:00,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074929487] [2022-03-15 21:17:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:00,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:00,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074929487] [2022-03-15 21:17:00,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074929487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:00,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690739410] [2022-03-15 21:17:00,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:00,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:00,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:00,110 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 21:17:00,111 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 21:17:00,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:17:00,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:00,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:00,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:00,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690739410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:00,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:00,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 18 [2022-03-15 21:17:00,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1032813896] [2022-03-15 21:17:00,264 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:00,265 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:00,267 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2022-03-15 21:17:00,267 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:00,297 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [290770#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 290768#(< i2 (* 2 N)), 290769#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:17:00,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:17:00,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:17:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:17:00,297 INFO L87 Difference]: Start difference. First operand 1910 states and 5213 transitions. Second operand has 14 states, 14 states have (on average 2.0) 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 21:17:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:00,415 INFO L93 Difference]: Finished difference Result 2361 states and 6017 transitions. [2022-03-15 21:17:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:17:00,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) 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 21 [2022-03-15 21:17:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:00,418 INFO L225 Difference]: With dead ends: 2361 [2022-03-15 21:17:00,418 INFO L226 Difference]: Without dead ends: 2358 [2022-03-15 21:17:00,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:17:00,418 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 95 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:00,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:17:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-03-15 21:17:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1910. [2022-03-15 21:17:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.7291775798847566) internal successors, (5210), 1909 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 5210 transitions. [2022-03-15 21:17:00,440 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 5210 transitions. Word has length 21 [2022-03-15 21:17:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:00,440 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 5210 transitions. [2022-03-15 21:17:00,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) 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 21:17:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 5210 transitions. [2022-03-15 21:17:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:00,442 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:00,442 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:00,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 21:17:00,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:00,655 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1312907591, now seen corresponding path program 91 times [2022-03-15 21:17:00,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:00,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228576208] [2022-03-15 21:17:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:00,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:00,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:00,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228576208] [2022-03-15 21:17:00,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228576208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:00,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638327105] [2022-03-15 21:17:00,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:00,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:00,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:00,696 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 21:17:00,697 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 21:17:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:00,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:00,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638327105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:00,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:00,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 19 [2022-03-15 21:17:00,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1077991587] [2022-03-15 21:17:00,851 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:00,853 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:00,855 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:17:00,855 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:00,888 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [297118#(< i2 (* 2 N)), 297119#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:17:00,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:17:00,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:00,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:17:00,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:17:00,889 INFO L87 Difference]: Start difference. First operand 1910 states and 5210 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:17:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:01,021 INFO L93 Difference]: Finished difference Result 2439 states and 6228 transitions. [2022-03-15 21:17:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:17:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:17:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:01,024 INFO L225 Difference]: With dead ends: 2439 [2022-03-15 21:17:01,025 INFO L226 Difference]: Without dead ends: 2437 [2022-03-15 21:17:01,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=444, Invalid=816, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:17:01,025 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 80 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:01,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2022-03-15 21:17:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1961. [2022-03-15 21:17:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.737755102040816) internal successors, (5366), 1960 states have internal predecessors, (5366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5366 transitions. [2022-03-15 21:17:01,048 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5366 transitions. Word has length 21 [2022-03-15 21:17:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:01,048 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 5366 transitions. [2022-03-15 21:17:01,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:17:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5366 transitions. [2022-03-15 21:17:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:01,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:01,050 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:01,065 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 21:17:01,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:01,265 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash -795495229, now seen corresponding path program 92 times [2022-03-15 21:17:01,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:01,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226319048] [2022-03-15 21:17:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:01,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:01,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:01,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226319048] [2022-03-15 21:17:01,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226319048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:01,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777338902] [2022-03-15 21:17:01,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:01,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:01,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:01,336 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 21:17:01,337 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 21:17:01,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:17:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:17:01,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:17:01,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777338902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:01,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:01,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 20 [2022-03-15 21:17:01,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [753792189] [2022-03-15 21:17:01,496 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:01,497 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:01,500 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 53 transitions. [2022-03-15 21:17:01,500 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:01,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [303659#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 303650#(< i1 (* 2 N)), 303651#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 303652#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 303663#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 303660#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 303656#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 303662#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 303661#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 303654#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 303655#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 303658#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 303657#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 303653#(< i2 (* 2 N))] [2022-03-15 21:17:01,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:17:01,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:17:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:17:01,732 INFO L87 Difference]: Start difference. First operand 1961 states and 5366 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:03,228 INFO L93 Difference]: Finished difference Result 3028 states and 7401 transitions. [2022-03-15 21:17:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 21:17:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:17:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:03,232 INFO L225 Difference]: With dead ends: 3028 [2022-03-15 21:17:03,232 INFO L226 Difference]: Without dead ends: 2870 [2022-03-15 21:17:03,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4060 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2164, Invalid=10268, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 21:17:03,234 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 326 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:03,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:17:03,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2022-03-15 21:17:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1689. [2022-03-15 21:17:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 2.6558056872037916) internal successors, (4483), 1688 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 4483 transitions. [2022-03-15 21:17:03,255 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 4483 transitions. Word has length 21 [2022-03-15 21:17:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:03,255 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 4483 transitions. [2022-03-15 21:17:03,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 4483 transitions. [2022-03-15 21:17:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:03,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:03,257 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:03,272 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 21:17:03,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:03,472 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash 351795555, now seen corresponding path program 93 times [2022-03-15 21:17:03,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:03,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829584440] [2022-03-15 21:17:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:03,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:03,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829584440] [2022-03-15 21:17:03,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829584440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:03,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969916194] [2022-03-15 21:17:03,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:03,535 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 21:17:03,536 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 21:17:03,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:17:03,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:03,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:03,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:03,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969916194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:03,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:03,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 19 [2022-03-15 21:17:03,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1088704858] [2022-03-15 21:17:03,692 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:03,693 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:03,695 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2022-03-15 21:17:03,695 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:03,706 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [310364#(< i2 (* 2 N))] [2022-03-15 21:17:03,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:17:03,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:03,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:17:03,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:17:03,706 INFO L87 Difference]: Start difference. First operand 1689 states and 4483 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:03,877 INFO L93 Difference]: Finished difference Result 2379 states and 5803 transitions. [2022-03-15 21:17:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:17:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:17:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:03,880 INFO L225 Difference]: With dead ends: 2379 [2022-03-15 21:17:03,880 INFO L226 Difference]: Without dead ends: 2377 [2022-03-15 21:17:03,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=473, Invalid=859, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:17:03,880 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 70 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:03,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-03-15 21:17:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1686. [2022-03-15 21:17:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.6522255192878337) internal successors, (4469), 1685 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4469 transitions. [2022-03-15 21:17:03,898 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4469 transitions. Word has length 21 [2022-03-15 21:17:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:03,898 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 4469 transitions. [2022-03-15 21:17:03,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4469 transitions. [2022-03-15 21:17:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:03,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:03,900 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:03,916 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 21:17:04,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:04,116 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:04,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:04,116 INFO L85 PathProgramCache]: Analyzing trace with hash -146905785, now seen corresponding path program 94 times [2022-03-15 21:17:04,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:04,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581254852] [2022-03-15 21:17:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:04,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:04,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581254852] [2022-03-15 21:17:04,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581254852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:04,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475112208] [2022-03-15 21:17:04,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:17:04,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:04,180 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 21:17:04,196 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 21:17:04,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:17:04,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:04,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:04,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:04,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475112208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:04,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:04,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:17:04,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1887126209] [2022-03-15 21:17:04,388 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:04,390 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:04,392 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2022-03-15 21:17:04,392 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:04,434 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [316289#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:17:04,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:17:04,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:04,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:17:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:17:04,434 INFO L87 Difference]: Start difference. First operand 1686 states and 4469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:17:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:04,571 INFO L93 Difference]: Finished difference Result 2446 states and 5873 transitions. [2022-03-15 21:17:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:17:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21 [2022-03-15 21:17:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:04,574 INFO L225 Difference]: With dead ends: 2446 [2022-03-15 21:17:04,574 INFO L226 Difference]: Without dead ends: 2446 [2022-03-15 21:17:04,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=421, Invalid=839, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:17:04,574 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 84 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:04,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2022-03-15 21:17:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1687. [2022-03-15 21:17:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.6524317912218267) internal successors, (4472), 1686 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4472 transitions. [2022-03-15 21:17:04,593 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4472 transitions. Word has length 21 [2022-03-15 21:17:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:04,594 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 4472 transitions. [2022-03-15 21:17:04,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 21:17:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4472 transitions. [2022-03-15 21:17:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:04,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:04,595 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:04,613 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 21:17:04,797 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,SelfDestructingSolverStorable96 [2022-03-15 21:17:04,797 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:04,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1002212439, now seen corresponding path program 95 times [2022-03-15 21:17:04,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:04,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432056180] [2022-03-15 21:17:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:04,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:04,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:04,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432056180] [2022-03-15 21:17:04,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432056180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:04,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529607983] [2022-03-15 21:17:04,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:17:04,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:04,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:04,859 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 21:17:04,860 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 21:17:04,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:17:04,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:04,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:05,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529607983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:05,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:05,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14] total 21 [2022-03-15 21:17:05,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [672291938] [2022-03-15 21:17:05,073 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:05,074 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:05,077 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2022-03-15 21:17:05,077 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:05,171 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [322281#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 322280#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:17:05,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:17:05,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:17:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:17:05,172 INFO L87 Difference]: Start difference. First operand 1687 states and 4472 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:17:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:05,423 INFO L93 Difference]: Finished difference Result 2438 states and 5847 transitions. [2022-03-15 21:17:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:17:05,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21 [2022-03-15 21:17:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:05,427 INFO L225 Difference]: With dead ends: 2438 [2022-03-15 21:17:05,427 INFO L226 Difference]: Without dead ends: 2438 [2022-03-15 21:17:05,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=550, Invalid=1256, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:17:05,429 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 91 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:05,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-03-15 21:17:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1689. [2022-03-15 21:17:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 2.6528436018957344) internal successors, (4478), 1688 states have internal predecessors, (4478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 4478 transitions. [2022-03-15 21:17:05,470 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 4478 transitions. Word has length 21 [2022-03-15 21:17:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:05,470 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 4478 transitions. [2022-03-15 21:17:05,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 21:17:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 4478 transitions. [2022-03-15 21:17:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:05,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:05,472 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:05,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:05,683 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,SelfDestructingSolverStorable97 [2022-03-15 21:17:05,683 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1746914937, now seen corresponding path program 96 times [2022-03-15 21:17:05,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:05,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274680853] [2022-03-15 21:17:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:05,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:05,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:05,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274680853] [2022-03-15 21:17:05,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274680853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:05,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418881024] [2022-03-15 21:17:05,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:05,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:05,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:05,731 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 21:17:05,732 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 21:17:05,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:17:05,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:05,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:05,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418881024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:05,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:05,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 21 [2022-03-15 21:17:05,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1691801509] [2022-03-15 21:17:05,945 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:05,946 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:05,949 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2022-03-15 21:17:05,949 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:06,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [328279#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 328278#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 328280#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:17:06,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:17:06,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:17:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:17:06,047 INFO L87 Difference]: Start difference. First operand 1689 states and 4478 transitions. Second operand has 16 states, 16 states have (on average 2.0) 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 21:17:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:06,375 INFO L93 Difference]: Finished difference Result 2333 states and 5617 transitions. [2022-03-15 21:17:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:17:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) 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 21 [2022-03-15 21:17:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:06,378 INFO L225 Difference]: With dead ends: 2333 [2022-03-15 21:17:06,378 INFO L226 Difference]: Without dead ends: 2333 [2022-03-15 21:17:06,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=737, Invalid=1915, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:17:06,379 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 99 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:06,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2022-03-15 21:17:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1671. [2022-03-15 21:17:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 2.658682634730539) internal successors, (4440), 1670 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 4440 transitions. [2022-03-15 21:17:06,399 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 4440 transitions. Word has length 21 [2022-03-15 21:17:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:06,399 INFO L470 AbstractCegarLoop]: Abstraction has 1671 states and 4440 transitions. [2022-03-15 21:17:06,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) 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 21:17:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 4440 transitions. [2022-03-15 21:17:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:06,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:06,400 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:06,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 21:17:06,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:06,616 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:06,616 INFO L85 PathProgramCache]: Analyzing trace with hash 937111401, now seen corresponding path program 97 times [2022-03-15 21:17:06,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:06,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299800257] [2022-03-15 21:17:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:06,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:06,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299800257] [2022-03-15 21:17:06,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299800257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:06,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174604350] [2022-03-15 21:17:06,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:06,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:06,691 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 21:17:06,692 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 21:17:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:06,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:06,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:06,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174604350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:06,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:06,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 22 [2022-03-15 21:17:06,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [11293965] [2022-03-15 21:17:06,900 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:06,901 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:06,904 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 41 transitions. [2022-03-15 21:17:06,904 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:07,041 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [334154#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 334155#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 334156#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 334153#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:17:07,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:17:07,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:07,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:17:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:17:07,042 INFO L87 Difference]: Start difference. First operand 1671 states and 4440 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) 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 21:17:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:07,361 INFO L93 Difference]: Finished difference Result 2060 states and 5058 transitions. [2022-03-15 21:17:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:17:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) 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 21 [2022-03-15 21:17:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:07,364 INFO L225 Difference]: With dead ends: 2060 [2022-03-15 21:17:07,364 INFO L226 Difference]: Without dead ends: 2060 [2022-03-15 21:17:07,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=730, Invalid=1922, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:17:07,364 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 107 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:07,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-03-15 21:17:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1636. [2022-03-15 21:17:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.6470948012232416) internal successors, (4328), 1635 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 4328 transitions. [2022-03-15 21:17:07,385 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 4328 transitions. Word has length 21 [2022-03-15 21:17:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:07,385 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 4328 transitions. [2022-03-15 21:17:07,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) 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 21:17:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 4328 transitions. [2022-03-15 21:17:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:07,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:07,387 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:07,402 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 21:17:07,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:07,599 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:07,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1757418041, now seen corresponding path program 98 times [2022-03-15 21:17:07,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:07,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499086633] [2022-03-15 21:17:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:07,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:07,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:07,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499086633] [2022-03-15 21:17:07,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499086633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:07,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164120970] [2022-03-15 21:17:07,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:07,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:07,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:07,660 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 21:17:07,661 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 21:17:07,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:07,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:07,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:07,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:07,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164120970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:07,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:07,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 22 [2022-03-15 21:17:07,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [130397433] [2022-03-15 21:17:07,830 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:07,831 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:07,834 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 45 transitions. [2022-03-15 21:17:07,834 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:07,980 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [339682#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 339685#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 339683#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 339684#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 339686#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:17:07,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:17:07,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:17:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:17:07,981 INFO L87 Difference]: Start difference. First operand 1636 states and 4328 transitions. Second operand has 20 states, 20 states have (on average 1.9) 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 21:17:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:08,546 INFO L93 Difference]: Finished difference Result 2137 states and 5228 transitions. [2022-03-15 21:17:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:17:08,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) 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 21:17:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:08,548 INFO L225 Difference]: With dead ends: 2137 [2022-03-15 21:17:08,548 INFO L226 Difference]: Without dead ends: 2137 [2022-03-15 21:17:08,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1219, Invalid=3337, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:17:08,549 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 110 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:08,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:17:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-03-15 21:17:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1648. [2022-03-15 21:17:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 2.649666059502125) internal successors, (4364), 1647 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 4364 transitions. [2022-03-15 21:17:08,567 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 4364 transitions. Word has length 21 [2022-03-15 21:17:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 4364 transitions. [2022-03-15 21:17:08,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) 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 21:17:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 4364 transitions. [2022-03-15 21:17:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:08,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:08,569 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:08,584 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 21:17:08,784 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,SelfDestructingSolverStorable100 [2022-03-15 21:17:08,784 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2132302807, now seen corresponding path program 99 times [2022-03-15 21:17:08,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:08,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846465221] [2022-03-15 21:17:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:08,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:08,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:08,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846465221] [2022-03-15 21:17:08,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846465221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:08,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898875390] [2022-03-15 21:17:08,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:08,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:08,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:08,852 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 21:17:08,852 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 21:17:08,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:17:08,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:08,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:08,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:09,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898875390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:09,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:09,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 22 [2022-03-15 21:17:09,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [975821941] [2022-03-15 21:17:09,022 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:09,024 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:09,026 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:17:09,026 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:09,138 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [345344#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 345345#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 345346#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 345348#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 345343#(< i2 (* 2 N)), 345347#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:17:09,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:17:09,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:17:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=566, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:17:09,138 INFO L87 Difference]: Start difference. First operand 1648 states and 4364 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:09,322 INFO L93 Difference]: Finished difference Result 1996 states and 4910 transitions. [2022-03-15 21:17:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:17:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:17:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:09,324 INFO L225 Difference]: With dead ends: 1996 [2022-03-15 21:17:09,324 INFO L226 Difference]: Without dead ends: 1990 [2022-03-15 21:17:09,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=541, Invalid=1181, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:17:09,326 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 107 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:09,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2022-03-15 21:17:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1609. [2022-03-15 21:17:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.633084577114428) internal successors, (4234), 1608 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4234 transitions. [2022-03-15 21:17:09,362 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4234 transitions. Word has length 21 [2022-03-15 21:17:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:09,362 INFO L470 AbstractCegarLoop]: Abstraction has 1609 states and 4234 transitions. [2022-03-15 21:17:09,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4234 transitions. [2022-03-15 21:17:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:09,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:09,363 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:09,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:09,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:09,579 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -318452189, now seen corresponding path program 100 times [2022-03-15 21:17:09,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:09,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724460917] [2022-03-15 21:17:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:09,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:09,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:09,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724460917] [2022-03-15 21:17:09,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724460917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:09,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249061413] [2022-03-15 21:17:09,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:17:09,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:09,664 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 21:17:09,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:17:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:09,703 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 21:17:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:09,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:09,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249061413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:09,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:09,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2022-03-15 21:17:09,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [453873231] [2022-03-15 21:17:09,834 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:09,835 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:09,838 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:17:09,838 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:09,935 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [350731#(< i2 (* 2 N)), 350734#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 350732#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 350733#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 350735#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:17:09,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:17:09,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:09,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:17:09,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:17:09,936 INFO L87 Difference]: Start difference. First operand 1609 states and 4234 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:10,136 INFO L93 Difference]: Finished difference Result 2046 states and 5001 transitions. [2022-03-15 21:17:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:17:10,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:17:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:10,138 INFO L225 Difference]: With dead ends: 2046 [2022-03-15 21:17:10,138 INFO L226 Difference]: Without dead ends: 2041 [2022-03-15 21:17:10,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=535, Invalid=1105, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:17:10,139 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 155 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:10,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 1 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:10,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2022-03-15 21:17:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1569. [2022-03-15 21:17:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 2.6167091836734695) internal successors, (4103), 1568 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 4103 transitions. [2022-03-15 21:17:10,157 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 4103 transitions. Word has length 21 [2022-03-15 21:17:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:10,157 INFO L470 AbstractCegarLoop]: Abstraction has 1569 states and 4103 transitions. [2022-03-15 21:17:10,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 4103 transitions. [2022-03-15 21:17:10,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:10,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:10,158 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:10,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-15 21:17:10,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 21:17:10,374 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:10,374 INFO L85 PathProgramCache]: Analyzing trace with hash -537035543, now seen corresponding path program 101 times [2022-03-15 21:17:10,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:10,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313436108] [2022-03-15 21:17:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:10,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:10,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:10,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313436108] [2022-03-15 21:17:10,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313436108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:10,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843650764] [2022-03-15 21:17:10,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:17:10,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:10,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:10,439 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 21:17:10,439 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 21:17:10,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:17:10,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:10,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:10,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843650764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:10,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:10,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 21 [2022-03-15 21:17:10,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [180483858] [2022-03-15 21:17:10,624 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:10,625 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:10,628 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:17:10,628 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:10,710 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [356090#(< i2 (* 2 N)), 356093#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 356091#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 356092#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N)))] [2022-03-15 21:17:10,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:17:10,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:17:10,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:17:10,711 INFO L87 Difference]: Start difference. First operand 1569 states and 4103 transitions. Second operand has 17 states, 17 states have (on average 2.0) 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 21:17:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:10,907 INFO L93 Difference]: Finished difference Result 2054 states and 4993 transitions. [2022-03-15 21:17:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:17:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) 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 21 [2022-03-15 21:17:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:10,910 INFO L225 Difference]: With dead ends: 2054 [2022-03-15 21:17:10,910 INFO L226 Difference]: Without dead ends: 2050 [2022-03-15 21:17:10,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=548, Invalid=1092, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:17:10,910 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 69 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:10,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2022-03-15 21:17:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1527. [2022-03-15 21:17:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.601572739187418) internal successors, (3970), 1526 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3970 transitions. [2022-03-15 21:17:10,929 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3970 transitions. Word has length 21 [2022-03-15 21:17:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:10,929 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 3970 transitions. [2022-03-15 21:17:10,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) 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 21:17:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3970 transitions. [2022-03-15 21:17:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:10,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:10,930 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:10,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:11,145 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,SelfDestructingSolverStorable103 [2022-03-15 21:17:11,146 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1534123363, now seen corresponding path program 102 times [2022-03-15 21:17:11,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:11,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890377914] [2022-03-15 21:17:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:11,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:11,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:11,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890377914] [2022-03-15 21:17:11,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890377914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:11,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958757006] [2022-03-15 21:17:11,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:11,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:11,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:11,205 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 21:17:11,205 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 21:17:11,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:17:11,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:11,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:11,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:11,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958757006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:11,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:11,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 20 [2022-03-15 21:17:11,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [615586221] [2022-03-15 21:17:11,356 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:11,357 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:11,360 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:17:11,360 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:11,413 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [361375#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 361374#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 361373#(< i2 (* 2 N))] [2022-03-15 21:17:11,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:17:11,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:17:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:17:11,414 INFO L87 Difference]: Start difference. First operand 1527 states and 3970 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:11,598 INFO L93 Difference]: Finished difference Result 2013 states and 4863 transitions. [2022-03-15 21:17:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:17:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 21:17:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:11,601 INFO L225 Difference]: With dead ends: 2013 [2022-03-15 21:17:11,601 INFO L226 Difference]: Without dead ends: 2010 [2022-03-15 21:17:11,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=530, Invalid=1030, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:17:11,601 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 137 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:11,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-03-15 21:17:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1526. [2022-03-15 21:17:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.6) internal successors, (3965), 1525 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3965 transitions. [2022-03-15 21:17:11,617 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3965 transitions. Word has length 21 [2022-03-15 21:17:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:11,617 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 3965 transitions. [2022-03-15 21:17:11,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3965 transitions. [2022-03-15 21:17:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:11,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:11,619 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:11,634 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 21:17:11,834 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,SelfDestructingSolverStorable104 [2022-03-15 21:17:11,835 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2016576937, now seen corresponding path program 103 times [2022-03-15 21:17:11,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:11,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125994113] [2022-03-15 21:17:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:11,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:11,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125994113] [2022-03-15 21:17:11,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125994113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:11,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648898427] [2022-03-15 21:17:11,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:11,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:11,883 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 21:17:11,884 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 21:17:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:11,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:12,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648898427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:12,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:12,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:17:12,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [518544583] [2022-03-15 21:17:12,032 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:12,033 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:12,036 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:17:12,036 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:12,071 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [366614#(< i2 (* 2 N)), 366615#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:17:12,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:17:12,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:12,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:17:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=313, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:17:12,072 INFO L87 Difference]: Start difference. First operand 1526 states and 3965 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 21:17:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:12,196 INFO L93 Difference]: Finished difference Result 1968 states and 4769 transitions. [2022-03-15 21:17:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:17:12,197 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 21 [2022-03-15 21:17:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:12,199 INFO L225 Difference]: With dead ends: 1968 [2022-03-15 21:17:12,199 INFO L226 Difference]: Without dead ends: 1966 [2022-03-15 21:17:12,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=537, Invalid=1023, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:17:12,199 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:12,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-03-15 21:17:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1526. [2022-03-15 21:17:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.598688524590164) internal successors, (3963), 1525 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3963 transitions. [2022-03-15 21:17:12,216 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3963 transitions. Word has length 21 [2022-03-15 21:17:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:12,216 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 3963 transitions. [2022-03-15 21:17:12,216 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 21:17:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3963 transitions. [2022-03-15 21:17:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:12,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:12,218 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:12,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:12,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:12,431 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -91825883, now seen corresponding path program 104 times [2022-03-15 21:17:12,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:12,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922356372] [2022-03-15 21:17:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:12,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:12,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:12,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922356372] [2022-03-15 21:17:12,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922356372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:12,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857791326] [2022-03-15 21:17:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:12,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:12,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:12,478 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 21:17:12,478 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 21:17:12,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:12,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:17:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:17:12,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:17:12,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857791326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:12,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:12,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 20 [2022-03-15 21:17:12,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1475455320] [2022-03-15 21:17:12,605 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:12,606 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:12,610 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 69 transitions. [2022-03-15 21:17:12,610 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:12,824 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [371822#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 371823#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 371811#(< i2 (* 2 N)), 371819#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 371813#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 371815#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 371821#(< i1 (* 2 N)), 371826#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 371812#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 371820#(<= (* 2 N) (+ 5 i2)), 371814#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 371816#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 371824#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 371817#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 371818#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 371825#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:17:12,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:17:12,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:17:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:17:12,825 INFO L87 Difference]: Start difference. First operand 1526 states and 3963 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) 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 21:17:14,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:14,507 INFO L93 Difference]: Finished difference Result 2316 states and 5472 transitions. [2022-03-15 21:17:14,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 21:17:14,507 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) 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 21 [2022-03-15 21:17:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:14,509 INFO L225 Difference]: With dead ends: 2316 [2022-03-15 21:17:14,509 INFO L226 Difference]: Without dead ends: 2229 [2022-03-15 21:17:14,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5181 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2694, Invalid=13056, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 21:17:14,511 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 333 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:14,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 1 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:17:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2022-03-15 21:17:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1421. [2022-03-15 21:17:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 2.623943661971831) internal successors, (3726), 1420 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 3726 transitions. [2022-03-15 21:17:14,527 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 3726 transitions. Word has length 21 [2022-03-15 21:17:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:14,527 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 3726 transitions. [2022-03-15 21:17:14,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) 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 21:17:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 3726 transitions. [2022-03-15 21:17:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:14,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:14,529 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:14,546 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 21:17:14,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:14,744 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1477950627, now seen corresponding path program 105 times [2022-03-15 21:17:14,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:14,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785838664] [2022-03-15 21:17:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:14,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:14,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:14,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785838664] [2022-03-15 21:17:14,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785838664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:14,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154816439] [2022-03-15 21:17:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:14,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:14,804 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 21:17:14,804 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 21:17:14,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:17:14,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:17:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-15 21:17:14,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-15 21:17:15,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154816439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:15,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:15,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 20 [2022-03-15 21:17:15,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1573397095] [2022-03-15 21:17:15,003 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:15,004 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:15,007 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:17:15,007 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:15,047 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [377304#(< i2 (* 2 N))] [2022-03-15 21:17:15,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:17:15,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:17:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:17:15,048 INFO L87 Difference]: Start difference. First operand 1421 states and 3726 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 21:17:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:15,276 INFO L93 Difference]: Finished difference Result 1837 states and 4555 transitions. [2022-03-15 21:17:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:17:15,276 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 21 [2022-03-15 21:17:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:15,279 INFO L225 Difference]: With dead ends: 1837 [2022-03-15 21:17:15,279 INFO L226 Difference]: Without dead ends: 1836 [2022-03-15 21:17:15,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:17:15,279 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 48 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:15,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2022-03-15 21:17:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1481. [2022-03-15 21:17:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 2.6425675675675677) internal successors, (3911), 1480 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 3911 transitions. [2022-03-15 21:17:15,293 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 3911 transitions. Word has length 21 [2022-03-15 21:17:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:15,293 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 3911 transitions. [2022-03-15 21:17:15,294 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 21:17:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 3911 transitions. [2022-03-15 21:17:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:15,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:15,295 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:15,310 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 21:17:15,510 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,SelfDestructingSolverStorable107 [2022-03-15 21:17:15,510 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 979249287, now seen corresponding path program 106 times [2022-03-15 21:17:15,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:15,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453767358] [2022-03-15 21:17:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:15,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:15,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:15,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453767358] [2022-03-15 21:17:15,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453767358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:15,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546013372] [2022-03-15 21:17:15,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:17:15,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:15,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:15,581 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 21:17:15,582 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 21:17:15,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:17:15,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:15,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:15,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546013372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:15,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:15,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:17:15,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [854807162] [2022-03-15 21:17:15,825 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:15,826 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:15,829 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 41 transitions. [2022-03-15 21:17:15,829 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:15,926 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [382281#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:17:15,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:17:15,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:17:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:17:15,927 INFO L87 Difference]: Start difference. First operand 1481 states and 3911 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 21:17:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:16,163 INFO L93 Difference]: Finished difference Result 1873 states and 4641 transitions. [2022-03-15 21:17:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:17:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 21 [2022-03-15 21:17:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:16,166 INFO L225 Difference]: With dead ends: 1873 [2022-03-15 21:17:16,166 INFO L226 Difference]: Without dead ends: 1873 [2022-03-15 21:17:16,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=837, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:17:16,166 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:16,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-03-15 21:17:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1481. [2022-03-15 21:17:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 2.6425675675675677) internal successors, (3911), 1480 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 3911 transitions. [2022-03-15 21:17:16,181 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 3911 transitions. Word has length 21 [2022-03-15 21:17:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:16,181 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 3911 transitions. [2022-03-15 21:17:16,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 21:17:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 3911 transitions. [2022-03-15 21:17:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:16,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:16,183 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:16,210 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 21:17:16,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:16,399 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:16,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:16,399 INFO L85 PathProgramCache]: Analyzing trace with hash 123942633, now seen corresponding path program 107 times [2022-03-15 21:17:16,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:16,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923071147] [2022-03-15 21:17:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:16,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:16,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:16,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923071147] [2022-03-15 21:17:16,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923071147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:16,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143318892] [2022-03-15 21:17:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:17:16,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:16,450 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 21:17:16,451 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 21:17:16,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:17:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:16,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:16,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:16,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143318892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:16,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:16,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 20 [2022-03-15 21:17:16,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1241790333] [2022-03-15 21:17:16,639 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:16,640 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:16,643 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 45 transitions. [2022-03-15 21:17:16,643 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:16,743 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [387287#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 387286#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:17:16,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:17:16,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:17:16,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:17:16,744 INFO L87 Difference]: Start difference. First operand 1481 states and 3911 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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 21:17:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:16,902 INFO L93 Difference]: Finished difference Result 1882 states and 4658 transitions. [2022-03-15 21:17:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:17:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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 21 [2022-03-15 21:17:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:16,904 INFO L225 Difference]: With dead ends: 1882 [2022-03-15 21:17:16,904 INFO L226 Difference]: Without dead ends: 1882 [2022-03-15 21:17:16,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=492, Invalid=1148, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:17:16,905 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:16,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2022-03-15 21:17:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1481. [2022-03-15 21:17:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 2.6425675675675677) internal successors, (3911), 1480 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 3911 transitions. [2022-03-15 21:17:16,942 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 3911 transitions. Word has length 21 [2022-03-15 21:17:16,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:16,942 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 3911 transitions. [2022-03-15 21:17:16,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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 21:17:16,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 3911 transitions. [2022-03-15 21:17:16,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:16,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:16,943 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:16,968 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 21:17:17,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:17,159 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:17,159 INFO L85 PathProgramCache]: Analyzing trace with hash -620759865, now seen corresponding path program 108 times [2022-03-15 21:17:17,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:17,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050547229] [2022-03-15 21:17:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:17,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:17,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:17,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050547229] [2022-03-15 21:17:17,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050547229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:17,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822397817] [2022-03-15 21:17:17,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:17,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:17,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:17,207 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 21:17:17,208 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 21:17:17,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:17:17,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:17,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:17,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:17,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:17,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822397817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:17,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:17,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 21 [2022-03-15 21:17:17,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [244233690] [2022-03-15 21:17:17,388 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:17,389 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:17,392 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 49 transitions. [2022-03-15 21:17:17,392 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:17,479 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [392310#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 392311#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 392312#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:17:17,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:17:17,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:17:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:17:17,480 INFO L87 Difference]: Start difference. First operand 1481 states and 3911 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 21:17:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:17,735 INFO L93 Difference]: Finished difference Result 1866 states and 4622 transitions. [2022-03-15 21:17:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:17:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 21:17:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:17,738 INFO L225 Difference]: With dead ends: 1866 [2022-03-15 21:17:17,738 INFO L226 Difference]: Without dead ends: 1866 [2022-03-15 21:17:17,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=685, Invalid=1865, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:17:17,738 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 104 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:17,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2022-03-15 21:17:17,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1481. [2022-03-15 21:17:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 2.6425675675675677) internal successors, (3911), 1480 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 3911 transitions. [2022-03-15 21:17:17,752 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 3911 transitions. Word has length 21 [2022-03-15 21:17:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:17,753 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 3911 transitions. [2022-03-15 21:17:17,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 21:17:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 3911 transitions. [2022-03-15 21:17:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:17,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:17,754 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:17,770 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 21:17:17,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:17,967 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2063266473, now seen corresponding path program 109 times [2022-03-15 21:17:17,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:17,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827649228] [2022-03-15 21:17:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:17,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:18,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:18,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827649228] [2022-03-15 21:17:18,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827649228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:18,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194713885] [2022-03-15 21:17:18,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:18,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:18,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:18,042 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 21:17:18,071 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 21:17:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:18,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:18,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194713885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:18,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:18,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2022-03-15 21:17:18,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [899649631] [2022-03-15 21:17:18,218 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:18,219 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:18,222 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 53 transitions. [2022-03-15 21:17:18,223 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:18,326 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [397338#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 397336#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 397337#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 397335#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:17:18,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:17:18,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:17:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:17:18,327 INFO L87 Difference]: Start difference. First operand 1481 states and 3911 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 21:17:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:18,574 INFO L93 Difference]: Finished difference Result 1780 states and 4448 transitions. [2022-03-15 21:17:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:17:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 21:17:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:18,576 INFO L225 Difference]: With dead ends: 1780 [2022-03-15 21:17:18,576 INFO L226 Difference]: Without dead ends: 1780 [2022-03-15 21:17:18,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1820, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:17:18,577 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 116 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:18,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-03-15 21:17:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1481. [2022-03-15 21:17:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 2.6425675675675677) internal successors, (3911), 1480 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 3911 transitions. [2022-03-15 21:17:18,591 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 3911 transitions. Word has length 21 [2022-03-15 21:17:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 3911 transitions. [2022-03-15 21:17:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 21:17:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 3911 transitions. [2022-03-15 21:17:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:18,593 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:18,593 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:18,608 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 21:17:18,807 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,SelfDestructingSolverStorable111 [2022-03-15 21:17:18,807 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:18,808 INFO L85 PathProgramCache]: Analyzing trace with hash -631262969, now seen corresponding path program 110 times [2022-03-15 21:17:18,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:18,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484741285] [2022-03-15 21:17:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:18,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:18,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:18,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484741285] [2022-03-15 21:17:18,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484741285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:18,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300062664] [2022-03-15 21:17:18,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:18,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:18,903 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 21:17:18,903 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 21:17:18,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:18,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:18,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:18,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:19,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300062664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:19,112 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:19,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 22 [2022-03-15 21:17:19,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [790970336] [2022-03-15 21:17:19,112 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:19,114 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:19,117 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 57 transitions. [2022-03-15 21:17:19,117 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:19,328 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [402275#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 402276#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 402274#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 402273#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 402272#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:17:19,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:17:19,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:17:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:17:19,328 INFO L87 Difference]: Start difference. First operand 1481 states and 3911 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 21:17:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:19,839 INFO L93 Difference]: Finished difference Result 1742 states and 4382 transitions. [2022-03-15 21:17:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:17:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 21:17:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:19,841 INFO L225 Difference]: With dead ends: 1742 [2022-03-15 21:17:19,842 INFO L226 Difference]: Without dead ends: 1742 [2022-03-15 21:17:19,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:17:19,842 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 109 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:19,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-03-15 21:17:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1457. [2022-03-15 21:17:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 2.6339285714285716) internal successors, (3835), 1456 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 3835 transitions. [2022-03-15 21:17:19,856 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 3835 transitions. Word has length 21 [2022-03-15 21:17:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:19,856 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 3835 transitions. [2022-03-15 21:17:19,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 21:17:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 3835 transitions. [2022-03-15 21:17:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:17:19,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:19,857 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:19,872 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 21:17:20,070 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,SelfDestructingSolverStorable112 [2022-03-15 21:17:20,070 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1737670249, now seen corresponding path program 111 times [2022-03-15 21:17:20,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:20,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695009591] [2022-03-15 21:17:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:20,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:20,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695009591] [2022-03-15 21:17:20,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695009591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:20,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436122673] [2022-03-15 21:17:20,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:20,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:20,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:20,159 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 21:17:20,159 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 21:17:20,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:17:20,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:20,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:20,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:20,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:20,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436122673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:20,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:20,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 22 [2022-03-15 21:17:20,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1232381951] [2022-03-15 21:17:20,356 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:20,357 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:20,361 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 65 transitions. [2022-03-15 21:17:20,361 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:20,605 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [407140#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 407145#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 407144#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 407141#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 407143#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 407142#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:17:20,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:17:20,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:17:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:17:20,606 INFO L87 Difference]: Start difference. First operand 1457 states and 3835 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 21:17:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:21,170 INFO L93 Difference]: Finished difference Result 1853 states and 4584 transitions. [2022-03-15 21:17:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:17:21,170 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 21:17:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:21,172 INFO L225 Difference]: With dead ends: 1853 [2022-03-15 21:17:21,172 INFO L226 Difference]: Without dead ends: 1853 [2022-03-15 21:17:21,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=927, Invalid=2855, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:17:21,173 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 113 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:21,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:17:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2022-03-15 21:17:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1452. [2022-03-15 21:17:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 2.6430048242591315) internal successors, (3835), 1451 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 3835 transitions. [2022-03-15 21:17:21,188 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 3835 transitions. Word has length 21 [2022-03-15 21:17:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:21,188 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 3835 transitions. [2022-03-15 21:17:21,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 21:17:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 3835 transitions. [2022-03-15 21:17:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:21,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:21,189 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:21,205 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 21:17:21,389 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,SelfDestructingSolverStorable113 [2022-03-15 21:17:21,390 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1712695816, now seen corresponding path program 112 times [2022-03-15 21:17:21,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:21,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535199662] [2022-03-15 21:17:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:21,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:21,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535199662] [2022-03-15 21:17:21,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535199662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:21,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832702539] [2022-03-15 21:17:21,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:17:21,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:21,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:21,488 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 21:17:21,489 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 21:17:21,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:17:21,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:21,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:21,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:21,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:21,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832702539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:21,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:21,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 28 [2022-03-15 21:17:21,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1363748633] [2022-03-15 21:17:21,749 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:21,750 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:21,753 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:17:21,753 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:21,881 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [412132#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 412134#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 412136#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 412133#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 412130#(< i2 (* 2 N)), 412131#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 412135#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N)))] [2022-03-15 21:17:21,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:17:21,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:17:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:17:21,881 INFO L87 Difference]: Start difference. First operand 1452 states and 3835 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 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 21:17:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:22,077 INFO L93 Difference]: Finished difference Result 1749 states and 4386 transitions. [2022-03-15 21:17:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:17:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 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 23 [2022-03-15 21:17:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:22,080 INFO L225 Difference]: With dead ends: 1749 [2022-03-15 21:17:22,080 INFO L226 Difference]: Without dead ends: 1749 [2022-03-15 21:17:22,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=686, Invalid=1666, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:17:22,080 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:22,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-03-15 21:17:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1491. [2022-03-15 21:17:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.65503355704698) internal successors, (3956), 1490 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3956 transitions. [2022-03-15 21:17:22,095 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3956 transitions. Word has length 23 [2022-03-15 21:17:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:22,095 INFO L470 AbstractCegarLoop]: Abstraction has 1491 states and 3956 transitions. [2022-03-15 21:17:22,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 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 21:17:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3956 transitions. [2022-03-15 21:17:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:22,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:22,097 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:22,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:22,311 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,SelfDestructingSolverStorable114 [2022-03-15 21:17:22,311 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1979993437, now seen corresponding path program 113 times [2022-03-15 21:17:22,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:22,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212654611] [2022-03-15 21:17:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:22,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:22,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:22,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212654611] [2022-03-15 21:17:22,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212654611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:22,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292171020] [2022-03-15 21:17:22,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:17:22,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:22,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:22,385 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 21:17:22,386 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 21:17:22,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:17:22,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:22,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:22,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:22,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:22,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292171020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:22,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:22,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-03-15 21:17:22,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1615977535] [2022-03-15 21:17:22,550 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:22,551 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:22,554 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:17:22,554 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:22,706 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [417054#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 417059#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 417058#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 417055#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 417056#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 417053#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 417057#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 417052#(< i2 (* 2 N))] [2022-03-15 21:17:22,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:17:22,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:17:22,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:17:22,706 INFO L87 Difference]: Start difference. First operand 1491 states and 3956 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 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 21:17:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:22,958 INFO L93 Difference]: Finished difference Result 1654 states and 4176 transitions. [2022-03-15 21:17:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:17:22,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 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 23 [2022-03-15 21:17:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:22,960 INFO L225 Difference]: With dead ends: 1654 [2022-03-15 21:17:22,960 INFO L226 Difference]: Without dead ends: 1648 [2022-03-15 21:17:22,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:17:22,961 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 96 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:22,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2022-03-15 21:17:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1471. [2022-03-15 21:17:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.642857142857143) internal successors, (3885), 1470 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3885 transitions. [2022-03-15 21:17:22,974 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3885 transitions. Word has length 23 [2022-03-15 21:17:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:22,974 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3885 transitions. [2022-03-15 21:17:22,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 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 21:17:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3885 transitions. [2022-03-15 21:17:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:22,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:22,976 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:22,991 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 21:17:23,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:23,191 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash -351171165, now seen corresponding path program 114 times [2022-03-15 21:17:23,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:23,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649392729] [2022-03-15 21:17:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:23,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:23,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:23,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649392729] [2022-03-15 21:17:23,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649392729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:23,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929954777] [2022-03-15 21:17:23,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:23,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:23,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:23,253 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 21:17:23,253 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 21:17:23,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:17:23,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:23,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:23,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929954777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:23,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:23,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 22 [2022-03-15 21:17:23,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2049955031] [2022-03-15 21:17:23,451 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:23,452 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:23,455 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 31 transitions. [2022-03-15 21:17:23,455 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:23,499 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [421842#(< i2 (* 2 N)), 421841#(< i1 (* 2 N)), 421843#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:17:23,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:17:23,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:23,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:17:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:17:23,499 INFO L87 Difference]: Start difference. First operand 1471 states and 3885 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:23,787 INFO L93 Difference]: Finished difference Result 1667 states and 4223 transitions. [2022-03-15 21:17:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:17:23,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:17:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:23,789 INFO L225 Difference]: With dead ends: 1667 [2022-03-15 21:17:23,789 INFO L226 Difference]: Without dead ends: 1661 [2022-03-15 21:17:23,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=734, Invalid=1716, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:17:23,790 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 32 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:23,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-03-15 21:17:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1463. [2022-03-15 21:17:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.6374829001367988) internal successors, (3856), 1462 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 3856 transitions. [2022-03-15 21:17:23,804 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 3856 transitions. Word has length 23 [2022-03-15 21:17:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:23,805 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 3856 transitions. [2022-03-15 21:17:23,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 3856 transitions. [2022-03-15 21:17:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:23,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:23,806 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:23,821 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 21:17:24,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:24,007 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1401170601, now seen corresponding path program 115 times [2022-03-15 21:17:24,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:24,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244270597] [2022-03-15 21:17:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:24,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:24,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:24,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244270597] [2022-03-15 21:17:24,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244270597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:24,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969728070] [2022-03-15 21:17:24,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:24,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:24,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:24,066 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 21:17:24,067 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 21:17:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:24,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:24,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:24,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:24,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969728070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:24,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:24,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 22 [2022-03-15 21:17:24,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1431793510] [2022-03-15 21:17:24,317 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:24,318 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:24,321 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:17:24,321 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:24,389 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [426640#(< i2 (* 2 N)), 426642#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 426641#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:17:24,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:17:24,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:24,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:17:24,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:17:24,390 INFO L87 Difference]: Start difference. First operand 1463 states and 3856 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 21:17:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:24,997 INFO L93 Difference]: Finished difference Result 2130 states and 5159 transitions. [2022-03-15 21:17:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:17:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 23 [2022-03-15 21:17:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:25,000 INFO L225 Difference]: With dead ends: 2130 [2022-03-15 21:17:25,001 INFO L226 Difference]: Without dead ends: 2121 [2022-03-15 21:17:25,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1094, Invalid=2812, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:17:25,001 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:25,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:17:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2022-03-15 21:17:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1586. [2022-03-15 21:17:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 2.6813880126182967) internal successors, (4250), 1585 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 4250 transitions. [2022-03-15 21:17:25,019 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 4250 transitions. Word has length 23 [2022-03-15 21:17:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:25,019 INFO L470 AbstractCegarLoop]: Abstraction has 1586 states and 4250 transitions. [2022-03-15 21:17:25,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 21:17:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 4250 transitions. [2022-03-15 21:17:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:25,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:25,021 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:25,036 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 21:17:25,221 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,SelfDestructingSolverStorable117 [2022-03-15 21:17:25,221 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:25,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash -559827677, now seen corresponding path program 116 times [2022-03-15 21:17:25,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:25,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398987980] [2022-03-15 21:17:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:25,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:25,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:25,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398987980] [2022-03-15 21:17:25,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398987980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:25,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866114390] [2022-03-15 21:17:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:25,276 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 21:17:25,277 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 21:17:25,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:25,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:25,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:25,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:25,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866114390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:25,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:25,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:17:25,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1096284797] [2022-03-15 21:17:25,509 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:25,510 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:25,513 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2022-03-15 21:17:25,513 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:25,540 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [432173#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 432172#(< i2 (* 2 N))] [2022-03-15 21:17:25,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:17:25,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:17:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:17:25,541 INFO L87 Difference]: Start difference. First operand 1586 states and 4250 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:25,670 INFO L93 Difference]: Finished difference Result 2204 states and 5474 transitions. [2022-03-15 21:17:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:17:25,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 23 [2022-03-15 21:17:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:25,673 INFO L225 Difference]: With dead ends: 2204 [2022-03-15 21:17:25,673 INFO L226 Difference]: Without dead ends: 2202 [2022-03-15 21:17:25,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:17:25,673 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 66 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:25,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2022-03-15 21:17:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1648. [2022-03-15 21:17:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 2.7012750455373404) internal successors, (4449), 1647 states have internal predecessors, (4449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 4449 transitions. [2022-03-15 21:17:25,691 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 4449 transitions. Word has length 23 [2022-03-15 21:17:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:25,691 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 4449 transitions. [2022-03-15 21:17:25,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 4449 transitions. [2022-03-15 21:17:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:25,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:25,693 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:25,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:25,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:25,908 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1339823708, now seen corresponding path program 117 times [2022-03-15 21:17:25,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:25,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482047466] [2022-03-15 21:17:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:25,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:25,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:25,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482047466] [2022-03-15 21:17:25,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482047466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:25,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734411686] [2022-03-15 21:17:25,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:25,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:25,966 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 21:17:25,967 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 21:17:25,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:17:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:17:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-15 21:17:26,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-15 21:17:26,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734411686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:26,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:26,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 4] total 23 [2022-03-15 21:17:26,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1941258413] [2022-03-15 21:17:26,244 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:26,245 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:26,249 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:17:26,249 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:26,433 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [437852#(<= (* 2 N) (+ i2 1)), 437789#(< i2 (* 2 N)), 437846#(< i1 (* 2 N)), 437849#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 437847#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 437848#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 437850#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 437851#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2))] [2022-03-15 21:17:26,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:17:26,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:26,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:17:26,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:17:26,434 INFO L87 Difference]: Start difference. First operand 1648 states and 4449 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:27,004 INFO L93 Difference]: Finished difference Result 2118 states and 5312 transitions. [2022-03-15 21:17:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:17:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:17:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:27,007 INFO L225 Difference]: With dead ends: 2118 [2022-03-15 21:17:27,007 INFO L226 Difference]: Without dead ends: 2098 [2022-03-15 21:17:27,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:17:27,008 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 78 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:27,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2022-03-15 21:17:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1639. [2022-03-15 21:17:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 2.691697191697192) internal successors, (4409), 1638 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 4409 transitions. [2022-03-15 21:17:27,025 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 4409 transitions. Word has length 23 [2022-03-15 21:17:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:27,026 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 4409 transitions. [2022-03-15 21:17:27,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 4409 transitions. [2022-03-15 21:17:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:27,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:27,027 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:27,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 21:17:27,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:27,243 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1636429127, now seen corresponding path program 118 times [2022-03-15 21:17:27,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:27,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990693487] [2022-03-15 21:17:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:27,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:27,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:27,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990693487] [2022-03-15 21:17:27,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990693487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:27,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695014916] [2022-03-15 21:17:27,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:17:27,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:27,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:27,279 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 21:17:27,280 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 21:17:27,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:17:27,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:27,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:27,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695014916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:27,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:27,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 22 [2022-03-15 21:17:27,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [572985254] [2022-03-15 21:17:27,448 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:27,449 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:27,452 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2022-03-15 21:17:27,452 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:27,513 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [443478#(< i2 (* 2 N)), 443481#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 443479#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 443480#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:17:27,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:17:27,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:17:27,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:17:27,513 INFO L87 Difference]: Start difference. First operand 1639 states and 4409 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 21:17:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:28,112 INFO L93 Difference]: Finished difference Result 2575 states and 6212 transitions. [2022-03-15 21:17:28,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 21:17:28,112 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 23 [2022-03-15 21:17:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:28,115 INFO L225 Difference]: With dead ends: 2575 [2022-03-15 21:17:28,116 INFO L226 Difference]: Without dead ends: 2552 [2022-03-15 21:17:28,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1615, Invalid=5027, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 21:17:28,116 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 119 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:28,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-03-15 21:17:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 1760. [2022-03-15 21:17:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.72484366117112) internal successors, (4793), 1759 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 4793 transitions. [2022-03-15 21:17:28,136 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 4793 transitions. Word has length 23 [2022-03-15 21:17:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:28,136 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 4793 transitions. [2022-03-15 21:17:28,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 21:17:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 4793 transitions. [2022-03-15 21:17:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:28,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:28,138 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:28,153 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 21:17:28,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:28,353 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:28,353 INFO L85 PathProgramCache]: Analyzing trace with hash -245807005, now seen corresponding path program 119 times [2022-03-15 21:17:28,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:28,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419715783] [2022-03-15 21:17:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:28,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:28,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:28,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419715783] [2022-03-15 21:17:28,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419715783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:28,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813214314] [2022-03-15 21:17:28,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:17:28,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:28,413 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 21:17:28,421 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 21:17:28,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:17:28,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:28,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:28,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:28,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:28,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813214314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:28,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:28,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:17:28,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [942809473] [2022-03-15 21:17:28,602 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:28,603 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:28,606 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2022-03-15 21:17:28,606 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:28,622 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [449840#(< i2 (* 2 N)), 449841#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:17:28,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:17:28,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:17:28,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:17:28,623 INFO L87 Difference]: Start difference. First operand 1760 states and 4793 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:28,693 INFO L93 Difference]: Finished difference Result 2413 states and 6075 transitions. [2022-03-15 21:17:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:17:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 23 [2022-03-15 21:17:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:28,696 INFO L225 Difference]: With dead ends: 2413 [2022-03-15 21:17:28,696 INFO L226 Difference]: Without dead ends: 2411 [2022-03-15 21:17:28,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=510, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:17:28,697 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:28,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:17:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-03-15 21:17:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1810. [2022-03-15 21:17:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.741846323935876) internal successors, (4960), 1809 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 4960 transitions. [2022-03-15 21:17:28,717 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 4960 transitions. Word has length 23 [2022-03-15 21:17:28,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:28,717 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 4960 transitions. [2022-03-15 21:17:28,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 4960 transitions. [2022-03-15 21:17:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:28,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:28,719 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:28,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:28,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:28,935 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:28,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2117000918, now seen corresponding path program 120 times [2022-03-15 21:17:28,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:28,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68436828] [2022-03-15 21:17:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:28,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:28,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68436828] [2022-03-15 21:17:28,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68436828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:28,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823751618] [2022-03-15 21:17:28,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:28,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:28,972 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 21:17:28,972 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 21:17:28,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:17:28,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:28,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:29,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:29,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823751618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:29,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:29,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 24 [2022-03-15 21:17:29,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [349729274] [2022-03-15 21:17:29,127 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:29,128 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:29,131 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 47 transitions. [2022-03-15 21:17:29,131 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:29,240 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [456051#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 456049#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 456045#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 456048#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 456052#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 456050#(< i1 (* 2 N)), 455987#(<= (* 2 N) (+ 2 i2)), 456044#(< i2 (* 2 N)), 456046#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 456047#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:17:29,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:17:29,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:17:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:17:29,240 INFO L87 Difference]: Start difference. First operand 1810 states and 4960 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) 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 21:17:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:29,894 INFO L93 Difference]: Finished difference Result 2447 states and 6211 transitions. [2022-03-15 21:17:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 21:17:29,895 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) 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 21:17:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:29,897 INFO L225 Difference]: With dead ends: 2447 [2022-03-15 21:17:29,898 INFO L226 Difference]: Without dead ends: 2409 [2022-03-15 21:17:29,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1880, Invalid=7050, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:17:29,899 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 165 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:29,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2022-03-15 21:17:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1803. [2022-03-15 21:17:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.732519422863485) internal successors, (4924), 1802 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4924 transitions. [2022-03-15 21:17:29,918 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4924 transitions. Word has length 23 [2022-03-15 21:17:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:29,930 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 4924 transitions. [2022-03-15 21:17:29,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) 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 21:17:29,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4924 transitions. [2022-03-15 21:17:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:29,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:29,932 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:29,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:30,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 21:17:30,148 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash 339508841, now seen corresponding path program 121 times [2022-03-15 21:17:30,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:30,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286008846] [2022-03-15 21:17:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:30,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:30,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286008846] [2022-03-15 21:17:30,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286008846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:30,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726054992] [2022-03-15 21:17:30,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:30,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:30,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:30,183 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 21:17:30,184 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 21:17:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:30,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:30,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726054992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:30,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:30,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 22 [2022-03-15 21:17:30,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [480560969] [2022-03-15 21:17:30,350 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:30,351 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:30,354 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:17:30,354 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:30,431 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [462387#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 462384#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 462386#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 462385#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 462383#(< i2 (* 2 N))] [2022-03-15 21:17:30,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:17:30,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:30,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:17:30,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:17:30,432 INFO L87 Difference]: Start difference. First operand 1803 states and 4924 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 21:17:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:31,167 INFO L93 Difference]: Finished difference Result 2877 states and 6958 transitions. [2022-03-15 21:17:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 21:17:31,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 23 [2022-03-15 21:17:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:31,171 INFO L225 Difference]: With dead ends: 2877 [2022-03-15 21:17:31,171 INFO L226 Difference]: Without dead ends: 2840 [2022-03-15 21:17:31,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1939, Invalid=6251, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 21:17:31,172 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 145 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:31,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:17:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2022-03-15 21:17:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 1931. [2022-03-15 21:17:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.7533678756476685) internal successors, (5314), 1930 states have internal predecessors, (5314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5314 transitions. [2022-03-15 21:17:31,194 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5314 transitions. Word has length 23 [2022-03-15 21:17:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 5314 transitions. [2022-03-15 21:17:31,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 21:17:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5314 transitions. [2022-03-15 21:17:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:31,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:31,196 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:31,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 21:17:31,411 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,SelfDestructingSolverStorable123 [2022-03-15 21:17:31,411 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash 898899235, now seen corresponding path program 122 times [2022-03-15 21:17:31,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:31,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345182215] [2022-03-15 21:17:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:31,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:31,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345182215] [2022-03-15 21:17:31,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345182215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:31,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163590199] [2022-03-15 21:17:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:31,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:31,462 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 21:17:31,463 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 21:17:31,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:31,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:31,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:31,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:31,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:31,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163590199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:31,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:31,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:17:31,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [695079239] [2022-03-15 21:17:31,622 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:31,623 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:31,626 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2022-03-15 21:17:31,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:31,642 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [469406#(< i2 (* 2 N)), 469407#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:17:31,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:17:31,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:17:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:17:31,643 INFO L87 Difference]: Start difference. First operand 1931 states and 5314 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:31,729 INFO L93 Difference]: Finished difference Result 2524 states and 6462 transitions. [2022-03-15 21:17:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:17:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 23 [2022-03-15 21:17:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:31,732 INFO L225 Difference]: With dead ends: 2524 [2022-03-15 21:17:31,732 INFO L226 Difference]: Without dead ends: 2522 [2022-03-15 21:17:31,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:17:31,732 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 62 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:31,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2022-03-15 21:17:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1971. [2022-03-15 21:17:31,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1970 states have (on average 2.767005076142132) internal successors, (5451), 1970 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 5451 transitions. [2022-03-15 21:17:31,754 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 5451 transitions. Word has length 23 [2022-03-15 21:17:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:31,754 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 5451 transitions. [2022-03-15 21:17:31,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 5451 transitions. [2022-03-15 21:17:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:31,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:31,756 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:31,771 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 21:17:31,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:31,971 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:31,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash -439690652, now seen corresponding path program 123 times [2022-03-15 21:17:31,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:31,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125530781] [2022-03-15 21:17:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:32,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:32,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125530781] [2022-03-15 21:17:32,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125530781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:32,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537309137] [2022-03-15 21:17:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:32,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:32,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:32,045 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 21:17:32,046 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 21:17:32,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:17:32,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:32,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:17:32,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-15 21:17:32,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-15 21:17:32,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537309137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:32,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:32,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 4] total 25 [2022-03-15 21:17:32,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [445873163] [2022-03-15 21:17:32,241 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:32,242 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:32,246 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:17:32,246 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:32,437 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [476050#(<= (* 2 N) (+ 3 i2)), 476044#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 476049#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 476041#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 476046#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 476048#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 475983#(< i2 (* 2 N)), 476045#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 476040#(< i1 (* 2 N)), 476042#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 476047#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 476043#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2))] [2022-03-15 21:17:32,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:17:32,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:17:32,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:17:32,438 INFO L87 Difference]: Start difference. First operand 1971 states and 5451 transitions. Second operand has 25 states, 25 states have (on average 1.96) 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 21:17:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:33,385 INFO L93 Difference]: Finished difference Result 2633 states and 6751 transitions. [2022-03-15 21:17:33,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 21:17:33,385 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) 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 23 [2022-03-15 21:17:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:33,388 INFO L225 Difference]: With dead ends: 2633 [2022-03-15 21:17:33,388 INFO L226 Difference]: Without dead ends: 2581 [2022-03-15 21:17:33,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1500, Invalid=8802, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 21:17:33,389 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 167 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:33,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:17:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2022-03-15 21:17:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 1968. [2022-03-15 21:17:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 2.7590238942552108) internal successors, (5427), 1967 states have internal predecessors, (5427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 5427 transitions. [2022-03-15 21:17:33,412 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 5427 transitions. Word has length 23 [2022-03-15 21:17:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:33,412 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 5427 transitions. [2022-03-15 21:17:33,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) 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 21:17:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 5427 transitions. [2022-03-15 21:17:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:33,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:33,414 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:33,429 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 21:17:33,629 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,SelfDestructingSolverStorable125 [2022-03-15 21:17:33,630 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1210314361, now seen corresponding path program 124 times [2022-03-15 21:17:33,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:33,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280780335] [2022-03-15 21:17:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:33,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:33,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280780335] [2022-03-15 21:17:33,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280780335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:33,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250128009] [2022-03-15 21:17:33,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:17:33,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:33,674 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 21:17:33,674 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 21:17:33,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:17:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:33,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:33,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250128009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:33,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:33,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 22 [2022-03-15 21:17:33,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1769575898] [2022-03-15 21:17:33,912 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:33,913 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:33,916 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 47 transitions. [2022-03-15 21:17:33,917 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:34,069 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [482907#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 482905#(< i2 (* 2 N)), 482908#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 482906#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 482910#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 482909#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2)))] [2022-03-15 21:17:34,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:17:34,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:34,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:17:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:17:34,070 INFO L87 Difference]: Start difference. First operand 1968 states and 5427 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 21:17:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:35,930 INFO L93 Difference]: Finished difference Result 3339 states and 8053 transitions. [2022-03-15 21:17:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-15 21:17:35,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:17:35,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:35,934 INFO L225 Difference]: With dead ends: 3339 [2022-03-15 21:17:35,934 INFO L226 Difference]: Without dead ends: 3286 [2022-03-15 21:17:35,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6553 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3311, Invalid=14245, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 21:17:35,936 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 239 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:35,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 1 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:17:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2022-03-15 21:17:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2101. [2022-03-15 21:17:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.768095238095238) internal successors, (5813), 2100 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5813 transitions. [2022-03-15 21:17:35,974 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5813 transitions. Word has length 23 [2022-03-15 21:17:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:35,974 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 5813 transitions. [2022-03-15 21:17:35,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 21:17:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5813 transitions. [2022-03-15 21:17:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:35,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:35,976 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:35,992 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 21:17:36,178 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,SelfDestructingSolverStorable126 [2022-03-15 21:17:36,178 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:36,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2025054307, now seen corresponding path program 125 times [2022-03-15 21:17:36,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:36,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988407516] [2022-03-15 21:17:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:36,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:36,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:36,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988407516] [2022-03-15 21:17:36,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988407516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:36,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9263467] [2022-03-15 21:17:36,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:17:36,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:36,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:36,222 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 21:17:36,223 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 21:17:36,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:17:36,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:36,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:36,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:36,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9263467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:36,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:36,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:17:36,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [298965203] [2022-03-15 21:17:36,395 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:36,396 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:36,399 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2022-03-15 21:17:36,399 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:36,418 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [490813#(< i2 (* 2 N)), 490814#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:17:36,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:17:36,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:17:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:17:36,419 INFO L87 Difference]: Start difference. First operand 2101 states and 5813 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:36,484 INFO L93 Difference]: Finished difference Result 2566 states and 6647 transitions. [2022-03-15 21:17:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:17:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 23 [2022-03-15 21:17:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:36,487 INFO L225 Difference]: With dead ends: 2566 [2022-03-15 21:17:36,487 INFO L226 Difference]: Without dead ends: 2564 [2022-03-15 21:17:36,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:17:36,487 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:36,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:36,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-03-15 21:17:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2121. [2022-03-15 21:17:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.775943396226415) internal successors, (5885), 2120 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:36,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 5885 transitions. [2022-03-15 21:17:36,510 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 5885 transitions. Word has length 23 [2022-03-15 21:17:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:36,510 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 5885 transitions. [2022-03-15 21:17:36,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 5885 transitions. [2022-03-15 21:17:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:36,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:36,513 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:36,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:36,727 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,SelfDestructingSolverStorable127 [2022-03-15 21:17:36,728 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:36,728 INFO L85 PathProgramCache]: Analyzing trace with hash 17320042, now seen corresponding path program 126 times [2022-03-15 21:17:36,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:36,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451530741] [2022-03-15 21:17:36,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:36,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:36,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:36,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451530741] [2022-03-15 21:17:36,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451530741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:36,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819405037] [2022-03-15 21:17:36,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:36,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:36,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:36,774 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 21:17:36,774 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 21:17:36,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:17:36,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:36,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:36,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:36,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:36,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819405037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:36,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:36,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 16] total 25 [2022-03-15 21:17:36,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1750772158] [2022-03-15 21:17:36,999 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:37,000 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:37,004 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 55 transitions. [2022-03-15 21:17:37,004 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:37,253 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [497793#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 497786#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 497791#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 497797#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 497788#(< i2 (* 2 N)), 497789#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 497796#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 497795#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 497792#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 497735#(<= (* 2 N) (+ i2 4)), 497785#(< i1 (* 2 N)), 497790#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 497794#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 497787#(or (< i1 (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:17:37,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:17:37,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:17:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:17:37,254 INFO L87 Difference]: Start difference. First operand 2121 states and 5885 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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 21:17:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:39,166 INFO L93 Difference]: Finished difference Result 3160 states and 8063 transitions. [2022-03-15 21:17:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 21:17:39,166 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 23 [2022-03-15 21:17:39,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:39,170 INFO L225 Difference]: With dead ends: 3160 [2022-03-15 21:17:39,170 INFO L226 Difference]: Without dead ends: 3086 [2022-03-15 21:17:39,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5348 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2952, Invalid=13304, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 21:17:39,172 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 263 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:39,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:17:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2022-03-15 21:17:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 2077. [2022-03-15 21:17:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 2.760597302504817) internal successors, (5731), 2076 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 5731 transitions. [2022-03-15 21:17:39,196 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 5731 transitions. Word has length 23 [2022-03-15 21:17:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:39,197 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 5731 transitions. [2022-03-15 21:17:39,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 21:17:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 5731 transitions. [2022-03-15 21:17:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:39,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:39,199 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:39,214 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 21:17:39,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-15 21:17:39,403 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2010193367, now seen corresponding path program 127 times [2022-03-15 21:17:39,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:39,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426130303] [2022-03-15 21:17:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:39,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:39,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:39,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426130303] [2022-03-15 21:17:39,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426130303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:39,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278873280] [2022-03-15 21:17:39,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:39,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:39,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:39,471 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 21:17:39,472 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 21:17:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:39,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:39,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:39,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:39,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278873280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:39,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:39,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 22 [2022-03-15 21:17:39,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [938879730] [2022-03-15 21:17:39,690 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:39,691 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:39,694 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:17:39,694 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:39,861 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [505451#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 505445#(< i2 (* 2 N)), 505447#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 505449#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 505448#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 505446#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 505450#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:17:39,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:17:39,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:39,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:17:39,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:17:39,863 INFO L87 Difference]: Start difference. First operand 2077 states and 5731 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 21:17:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:41,982 INFO L93 Difference]: Finished difference Result 3622 states and 8636 transitions. [2022-03-15 21:17:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-15 21:17:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 21:17:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:41,986 INFO L225 Difference]: With dead ends: 3622 [2022-03-15 21:17:41,986 INFO L226 Difference]: Without dead ends: 3551 [2022-03-15 21:17:41,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8830 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4015, Invalid=19241, Unknown=0, NotChecked=0, Total=23256 [2022-03-15 21:17:41,989 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 284 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:41,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:17:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2022-03-15 21:17:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2194. [2022-03-15 21:17:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 2.769265845873233) internal successors, (6073), 2193 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6073 transitions. [2022-03-15 21:17:42,016 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6073 transitions. Word has length 23 [2022-03-15 21:17:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:42,016 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 6073 transitions. [2022-03-15 21:17:42,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 21:17:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6073 transitions. [2022-03-15 21:17:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:42,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:42,018 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:42,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:42,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:42,233 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1868534237, now seen corresponding path program 128 times [2022-03-15 21:17:42,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:42,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712819621] [2022-03-15 21:17:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:42,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:42,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:42,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712819621] [2022-03-15 21:17:42,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712819621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:42,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824056691] [2022-03-15 21:17:42,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:42,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:42,285 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 21:17:42,286 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 21:17:42,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:42,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:42,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:42,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:42,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:42,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824056691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:42,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:42,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 22 [2022-03-15 21:17:42,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605209094] [2022-03-15 21:17:42,436 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:42,448 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:42,461 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 37 transitions. [2022-03-15 21:17:42,461 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:42,583 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [513866#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 513867#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 513868#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 513865#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 513864#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 513863#(< i2 (* 2 N))] [2022-03-15 21:17:42,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:17:42,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:17:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:17:42,583 INFO L87 Difference]: Start difference. First operand 2194 states and 6073 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 21:17:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:42,697 INFO L93 Difference]: Finished difference Result 2486 states and 6574 transitions. [2022-03-15 21:17:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:17:42,697 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 23 [2022-03-15 21:17:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:42,700 INFO L225 Difference]: With dead ends: 2486 [2022-03-15 21:17:42,700 INFO L226 Difference]: Without dead ends: 2478 [2022-03-15 21:17:42,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=472, Invalid=1088, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:17:42,700 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 32 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:42,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2022-03-15 21:17:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2115. [2022-03-15 21:17:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 2.7544938505203405) internal successors, (5823), 2114 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 5823 transitions. [2022-03-15 21:17:42,722 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 5823 transitions. Word has length 23 [2022-03-15 21:17:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:42,722 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 5823 transitions. [2022-03-15 21:17:42,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 21:17:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 5823 transitions. [2022-03-15 21:17:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:42,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:42,726 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:42,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-15 21:17:42,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:42,941 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:42,941 INFO L85 PathProgramCache]: Analyzing trace with hash 344005831, now seen corresponding path program 129 times [2022-03-15 21:17:42,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:42,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811918697] [2022-03-15 21:17:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:42,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:43,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:43,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811918697] [2022-03-15 21:17:43,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811918697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:43,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068558000] [2022-03-15 21:17:43,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:43,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:43,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:43,010 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 21:17:43,011 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 21:17:43,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:17:43,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:17:43,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-15 21:17:43,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-15 21:17:43,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068558000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:43,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:43,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 4] total 23 [2022-03-15 21:17:43,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1654247703] [2022-03-15 21:17:43,260 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:43,261 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:43,264 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2022-03-15 21:17:43,264 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:43,353 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [520764#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 520763#(< i2 (* 2 N)), 520765#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 520766#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 520767#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:17:43,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:17:43,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:17:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:17:43,354 INFO L87 Difference]: Start difference. First operand 2115 states and 5823 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:43,481 INFO L93 Difference]: Finished difference Result 2461 states and 6427 transitions. [2022-03-15 21:17:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:17:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:17:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:43,485 INFO L225 Difference]: With dead ends: 2461 [2022-03-15 21:17:43,485 INFO L226 Difference]: Without dead ends: 2457 [2022-03-15 21:17:43,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:17:43,485 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 36 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:43,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2022-03-15 21:17:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2044. [2022-03-15 21:17:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2043 states have (on average 2.7415565345080766) internal successors, (5601), 2043 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 5601 transitions. [2022-03-15 21:17:43,507 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 5601 transitions. Word has length 23 [2022-03-15 21:17:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:43,507 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 5601 transitions. [2022-03-15 21:17:43,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 5601 transitions. [2022-03-15 21:17:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:43,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:43,509 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:43,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-15 21:17:43,712 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,SelfDestructingSolverStorable131 [2022-03-15 21:17:43,712 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:43,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:43,713 INFO L85 PathProgramCache]: Analyzing trace with hash 138283427, now seen corresponding path program 130 times [2022-03-15 21:17:43,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:43,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294361185] [2022-03-15 21:17:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:43,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:43,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:43,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294361185] [2022-03-15 21:17:43,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294361185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:43,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521358828] [2022-03-15 21:17:43,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:17:43,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:43,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:43,773 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 21:17:43,774 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 21:17:43,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:17:43,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:43,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:43,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:43,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521358828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:43,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:43,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 21 [2022-03-15 21:17:43,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [453249754] [2022-03-15 21:17:43,983 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:43,984 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:43,987 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2022-03-15 21:17:43,987 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:44,050 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [527489#(< i2 (* 2 N)), 527491#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 527492#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 527490#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:17:44,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:17:44,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:44,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:17:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:17:44,051 INFO L87 Difference]: Start difference. First operand 2044 states and 5601 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:44,189 INFO L93 Difference]: Finished difference Result 2441 states and 6314 transitions. [2022-03-15 21:17:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:17:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:17:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:44,193 INFO L225 Difference]: With dead ends: 2441 [2022-03-15 21:17:44,193 INFO L226 Difference]: Without dead ends: 2438 [2022-03-15 21:17:44,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:17:44,193 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 43 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:44,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-03-15 21:17:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1984. [2022-03-15 21:17:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 2.72869389813414) internal successors, (5411), 1983 states have internal predecessors, (5411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 5411 transitions. [2022-03-15 21:17:44,230 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 5411 transitions. Word has length 23 [2022-03-15 21:17:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:44,230 INFO L470 AbstractCegarLoop]: Abstraction has 1984 states and 5411 transitions. [2022-03-15 21:17:44,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 5411 transitions. [2022-03-15 21:17:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:44,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:44,232 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:44,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-15 21:17:44,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:44,447 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1392373433, now seen corresponding path program 131 times [2022-03-15 21:17:44,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:44,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958158346] [2022-03-15 21:17:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 23 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:44,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:44,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958158346] [2022-03-15 21:17:44,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958158346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:44,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208864409] [2022-03-15 21:17:44,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:17:44,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:44,500 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 21:17:44,501 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 21:17:44,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:17:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:44,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 23 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:44,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:44,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208864409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:44,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:44,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 22 [2022-03-15 21:17:44,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1093516324] [2022-03-15 21:17:44,708 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:44,709 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:44,712 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 31 transitions. [2022-03-15 21:17:44,712 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:44,776 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [534073#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 534072#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 534071#(< i2 (* 2 N))] [2022-03-15 21:17:44,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:17:44,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:44,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:17:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:17:44,776 INFO L87 Difference]: Start difference. First operand 1984 states and 5411 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) 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 21:17:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:44,892 INFO L93 Difference]: Finished difference Result 2410 states and 6186 transitions. [2022-03-15 21:17:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:17:44,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 23 [2022-03-15 21:17:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:44,896 INFO L225 Difference]: With dead ends: 2410 [2022-03-15 21:17:44,896 INFO L226 Difference]: Without dead ends: 2410 [2022-03-15 21:17:44,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:17:44,896 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 48 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:44,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2022-03-15 21:17:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1990. [2022-03-15 21:17:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 2.729512317747612) internal successors, (5429), 1989 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 5429 transitions. [2022-03-15 21:17:44,917 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 5429 transitions. Word has length 23 [2022-03-15 21:17:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:44,917 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 5429 transitions. [2022-03-15 21:17:44,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) 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 21:17:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 5429 transitions. [2022-03-15 21:17:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:44,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:44,919 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:44,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 21:17:45,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:45,135 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:45,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:45,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1718844125, now seen corresponding path program 132 times [2022-03-15 21:17:45,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:45,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418646005] [2022-03-15 21:17:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:45,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:45,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:45,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418646005] [2022-03-15 21:17:45,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418646005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:45,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762512914] [2022-03-15 21:17:45,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:45,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:45,193 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 21:17:45,194 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 21:17:45,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:17:45,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:45,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:45,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:45,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:45,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762512914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:45,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:45,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2022-03-15 21:17:45,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [688698774] [2022-03-15 21:17:45,438 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:45,439 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:45,442 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2022-03-15 21:17:45,442 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:45,469 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [540627#(< i2 (* 2 N)), 540628#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:17:45,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:17:45,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:17:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:17:45,469 INFO L87 Difference]: Start difference. First operand 1990 states and 5429 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:45,565 INFO L93 Difference]: Finished difference Result 2703 states and 6782 transitions. [2022-03-15 21:17:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:17:45,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 23 [2022-03-15 21:17:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:45,568 INFO L225 Difference]: With dead ends: 2703 [2022-03-15 21:17:45,568 INFO L226 Difference]: Without dead ends: 2703 [2022-03-15 21:17:45,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:17:45,569 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 68 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:45,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2022-03-15 21:17:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2029. [2022-03-15 21:17:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 2.7465483234714005) internal successors, (5570), 2028 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5570 transitions. [2022-03-15 21:17:45,593 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5570 transitions. Word has length 23 [2022-03-15 21:17:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 5570 transitions. [2022-03-15 21:17:45,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21:17:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5570 transitions. [2022-03-15 21:17:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:45,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:45,595 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:45,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:45,799 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,SelfDestructingSolverStorable134 [2022-03-15 21:17:45,799 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1299749668, now seen corresponding path program 133 times [2022-03-15 21:17:45,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:45,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993312825] [2022-03-15 21:17:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:45,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:45,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:45,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993312825] [2022-03-15 21:17:45,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993312825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:45,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388913450] [2022-03-15 21:17:45,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:45,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:45,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:45,892 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 21:17:45,927 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 21:17:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:45,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:17:45,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:17:45,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:17:46,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388913450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:46,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:46,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 23 [2022-03-15 21:17:46,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [838175492] [2022-03-15 21:17:46,080 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:46,081 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:46,085 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 59 transitions. [2022-03-15 21:17:46,085 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:46,415 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [547555#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 547553#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 547558#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 547566#(<= (* 2 N) (+ 5 i2)), 547567#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 547557#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 547559#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 547561#(< i1 (* 2 N)), 547563#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 547564#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 547562#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 547554#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 547552#(< i2 (* 2 N)), 547560#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 547565#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 547556#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2)))] [2022-03-15 21:17:46,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:17:46,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:17:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:17:46,416 INFO L87 Difference]: Start difference. First operand 2029 states and 5570 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 21:17:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:48,534 INFO L93 Difference]: Finished difference Result 3106 states and 7791 transitions. [2022-03-15 21:17:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 21:17:48,534 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 23 [2022-03-15 21:17:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:48,538 INFO L225 Difference]: With dead ends: 3106 [2022-03-15 21:17:48,538 INFO L226 Difference]: Without dead ends: 3002 [2022-03-15 21:17:48,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5886 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2957, Invalid=14599, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 21:17:48,540 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 277 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:48,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:17:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2022-03-15 21:17:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 1987. [2022-03-15 21:17:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.7240684793554886) internal successors, (5410), 1986 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5410 transitions. [2022-03-15 21:17:48,563 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5410 transitions. Word has length 23 [2022-03-15 21:17:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:48,563 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 5410 transitions. [2022-03-15 21:17:48,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 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 21:17:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5410 transitions. [2022-03-15 21:17:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:48,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:48,565 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:48,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:48,780 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,SelfDestructingSolverStorable135 [2022-03-15 21:17:48,780 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:48,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:48,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1036638777, now seen corresponding path program 134 times [2022-03-15 21:17:48,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:48,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967094947] [2022-03-15 21:17:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:48,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:48,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:48,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967094947] [2022-03-15 21:17:48,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967094947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:48,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924444112] [2022-03-15 21:17:48,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:48,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:48,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:48,838 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 21:17:48,840 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 21:17:48,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:48,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:48,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:48,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:49,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924444112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:49,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:49,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 22 [2022-03-15 21:17:49,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [128690995] [2022-03-15 21:17:49,068 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:49,069 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:49,073 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 55 transitions. [2022-03-15 21:17:49,073 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:49,213 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [554995#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 554996#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 554989#(< i2 (* 2 N)), 554994#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 554993#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 554991#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 554990#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 554992#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:17:49,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:17:49,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:17:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=685, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:17:49,214 INFO L87 Difference]: Start difference. First operand 1987 states and 5410 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 21:17:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:52,111 INFO L93 Difference]: Finished difference Result 4352 states and 9985 transitions. [2022-03-15 21:17:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-15 21:17:52,111 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 23 [2022-03-15 21:17:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:52,116 INFO L225 Difference]: With dead ends: 4352 [2022-03-15 21:17:52,116 INFO L226 Difference]: Without dead ends: 4352 [2022-03-15 21:17:52,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19323 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7147, Invalid=40159, Unknown=0, NotChecked=0, Total=47306 [2022-03-15 21:17:52,121 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 402 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:52,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 1 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:17:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2022-03-15 21:17:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 2137. [2022-03-15 21:17:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 2.7298689138576777) internal successors, (5831), 2136 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 5831 transitions. [2022-03-15 21:17:52,151 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 5831 transitions. Word has length 23 [2022-03-15 21:17:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:52,151 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 5831 transitions. [2022-03-15 21:17:52,151 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 21:17:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 5831 transitions. [2022-03-15 21:17:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:52,153 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:52,153 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:52,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-15 21:17:52,368 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,SelfDestructingSolverStorable136 [2022-03-15 21:17:52,369 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2121520041, now seen corresponding path program 135 times [2022-03-15 21:17:52,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:52,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976223747] [2022-03-15 21:17:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:52,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:52,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:52,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976223747] [2022-03-15 21:17:52,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976223747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:52,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870589889] [2022-03-15 21:17:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:52,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:52,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:52,480 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 21:17:52,481 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 21:17:52,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:17:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:17:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-15 21:17:52,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 21:17:52,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870589889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:52,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:52,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 4] total 26 [2022-03-15 21:17:52,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1930102042] [2022-03-15 21:17:52,700 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:52,701 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:52,704 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:17:52,704 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:52,899 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [564161#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 564158#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 564157#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 564159#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 564156#(< i2 (* 2 N)), 564162#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 564160#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:17:52,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:17:52,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:52,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:17:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:17:52,900 INFO L87 Difference]: Start difference. First operand 2137 states and 5831 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 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 21:17:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:53,160 INFO L93 Difference]: Finished difference Result 2471 states and 6331 transitions. [2022-03-15 21:17:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:17:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 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 23 [2022-03-15 21:17:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:53,164 INFO L225 Difference]: With dead ends: 2471 [2022-03-15 21:17:53,164 INFO L226 Difference]: Without dead ends: 2471 [2022-03-15 21:17:53,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=440, Invalid=1722, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:17:53,164 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 66 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:53,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-03-15 21:17:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2142. [2022-03-15 21:17:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 2.7141522652965904) internal successors, (5811), 2141 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 5811 transitions. [2022-03-15 21:17:53,188 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 5811 transitions. Word has length 23 [2022-03-15 21:17:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:53,188 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 5811 transitions. [2022-03-15 21:17:53,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 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 21:17:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 5811 transitions. [2022-03-15 21:17:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:53,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:53,190 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:53,205 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 21:17:53,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:53,403 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1838184931, now seen corresponding path program 136 times [2022-03-15 21:17:53,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:53,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096800231] [2022-03-15 21:17:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:53,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:53,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096800231] [2022-03-15 21:17:53,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096800231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:53,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555508370] [2022-03-15 21:17:53,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:17:53,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:53,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:53,493 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 21:17:53,494 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 21:17:53,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:17:53,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:53,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:53,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:53,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:53,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555508370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:53,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:53,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 24 [2022-03-15 21:17:53,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1301487679] [2022-03-15 21:17:53,685 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:53,686 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:53,689 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:17:53,689 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:53,830 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [571102#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 571101#(< i2 (* 2 N)), 571105#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 571106#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 571104#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 571103#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:17:53,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:17:53,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:17:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:17:53,831 INFO L87 Difference]: Start difference. First operand 2142 states and 5811 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:54,028 INFO L93 Difference]: Finished difference Result 2591 states and 6518 transitions. [2022-03-15 21:17:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:17:54,028 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:17:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:54,032 INFO L225 Difference]: With dead ends: 2591 [2022-03-15 21:17:54,032 INFO L226 Difference]: Without dead ends: 2591 [2022-03-15 21:17:54,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=529, Invalid=1193, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:17:54,033 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:54,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-03-15 21:17:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2146. [2022-03-15 21:17:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 2145 states have (on average 2.703962703962704) internal successors, (5800), 2145 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 5800 transitions. [2022-03-15 21:17:54,059 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 5800 transitions. Word has length 23 [2022-03-15 21:17:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:54,059 INFO L470 AbstractCegarLoop]: Abstraction has 2146 states and 5800 transitions. [2022-03-15 21:17:54,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 5800 transitions. [2022-03-15 21:17:54,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:54,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:54,061 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:54,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:54,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-15 21:17:54,275 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2106139753, now seen corresponding path program 137 times [2022-03-15 21:17:54,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:54,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699179161] [2022-03-15 21:17:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:54,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:54,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:54,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699179161] [2022-03-15 21:17:54,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699179161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:54,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134164223] [2022-03-15 21:17:54,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:17:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:54,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:54,363 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 21:17:54,364 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 21:17:54,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:17:54,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:54,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:54,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134164223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:54,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:54,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 16] total 24 [2022-03-15 21:17:54,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1481770122] [2022-03-15 21:17:54,622 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:54,623 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:54,626 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:17:54,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:54,739 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [578172#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 578173#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 578171#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 578170#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 578169#(< i2 (* 2 N))] [2022-03-15 21:17:54,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:17:54,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:17:54,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:17:54,740 INFO L87 Difference]: Start difference. First operand 2146 states and 5800 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:54,931 INFO L93 Difference]: Finished difference Result 2729 states and 6765 transitions. [2022-03-15 21:17:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:17:54,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:17:54,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:54,935 INFO L225 Difference]: With dead ends: 2729 [2022-03-15 21:17:54,935 INFO L226 Difference]: Without dead ends: 2729 [2022-03-15 21:17:54,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:17:54,935 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:54,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:54,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2022-03-15 21:17:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2151. [2022-03-15 21:17:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 2.697674418604651) internal successors, (5800), 2150 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 5800 transitions. [2022-03-15 21:17:54,961 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 5800 transitions. Word has length 23 [2022-03-15 21:17:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:54,961 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 5800 transitions. [2022-03-15 21:17:54,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 5800 transitions. [2022-03-15 21:17:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:54,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:54,963 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:54,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:55,163 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,SelfDestructingSolverStorable139 [2022-03-15 21:17:55,163 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 36573475, now seen corresponding path program 138 times [2022-03-15 21:17:55,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:55,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736224446] [2022-03-15 21:17:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:55,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:55,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736224446] [2022-03-15 21:17:55,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736224446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:55,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154874243] [2022-03-15 21:17:55,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:17:55,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:55,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:55,244 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 21:17:55,244 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 21:17:55,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:17:55,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:55,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:55,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154874243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:55,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:55,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 23 [2022-03-15 21:17:55,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [379115898] [2022-03-15 21:17:55,417 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:55,418 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:55,421 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:17:55,421 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:55,483 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [585381#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 585382#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 585380#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 585379#(< i2 (* 2 N))] [2022-03-15 21:17:55,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:17:55,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:55,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:17:55,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:17:55,483 INFO L87 Difference]: Start difference. First operand 2151 states and 5800 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:17:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:55,583 INFO L93 Difference]: Finished difference Result 2904 states and 7095 transitions. [2022-03-15 21:17:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:17:55,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 23 [2022-03-15 21:17:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:55,587 INFO L225 Difference]: With dead ends: 2904 [2022-03-15 21:17:55,587 INFO L226 Difference]: Without dead ends: 2904 [2022-03-15 21:17:55,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:17:55,587 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:55,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2022-03-15 21:17:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2159. [2022-03-15 21:17:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 2.6936978683966637) internal successors, (5813), 2158 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 5813 transitions. [2022-03-15 21:17:55,613 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 5813 transitions. Word has length 23 [2022-03-15 21:17:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:55,613 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 5813 transitions. [2022-03-15 21:17:55,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:17:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 5813 transitions. [2022-03-15 21:17:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:55,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:55,615 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:55,631 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 21:17:55,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:55,831 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash 524002601, now seen corresponding path program 139 times [2022-03-15 21:17:55,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:55,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540747890] [2022-03-15 21:17:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:55,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:55,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540747890] [2022-03-15 21:17:55,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540747890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:55,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780360797] [2022-03-15 21:17:55,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:17:55,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:55,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:55,872 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 21:17:55,874 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 21:17:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:55,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:55,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:55,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:56,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780360797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:56,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:56,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15] total 23 [2022-03-15 21:17:56,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1809269367] [2022-03-15 21:17:56,067 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:56,068 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:56,071 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:17:56,071 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:56,143 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [592775#(< i2 (* 2 N)), 592777#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 592776#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:17:56,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:17:56,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:17:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:17:56,145 INFO L87 Difference]: Start difference. First operand 2159 states and 5813 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 21:17:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:56,244 INFO L93 Difference]: Finished difference Result 3071 states and 7420 transitions. [2022-03-15 21:17:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:17:56,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 23 [2022-03-15 21:17:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:56,248 INFO L225 Difference]: With dead ends: 3071 [2022-03-15 21:17:56,248 INFO L226 Difference]: Without dead ends: 3071 [2022-03-15 21:17:56,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=354, Invalid=638, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:17:56,248 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 58 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:56,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2022-03-15 21:17:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2170. [2022-03-15 21:17:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.6920239741816507) internal successors, (5839), 2169 states have internal predecessors, (5839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 5839 transitions. [2022-03-15 21:17:56,273 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 5839 transitions. Word has length 23 [2022-03-15 21:17:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:56,273 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 5839 transitions. [2022-03-15 21:17:56,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 21:17:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 5839 transitions. [2022-03-15 21:17:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:56,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:56,275 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:56,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:56,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:56,491 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:56,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:56,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1815578525, now seen corresponding path program 140 times [2022-03-15 21:17:56,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:56,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753443290] [2022-03-15 21:17:56,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:56,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:56,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:56,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753443290] [2022-03-15 21:17:56,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753443290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:56,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018178059] [2022-03-15 21:17:56,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:17:56,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:56,554 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 21:17:56,555 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 21:17:56,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:17:56,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:56,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:56,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:56,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018178059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:56,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:56,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14] total 22 [2022-03-15 21:17:56,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1149063140] [2022-03-15 21:17:56,809 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:56,810 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:56,814 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 41 transitions. [2022-03-15 21:17:56,814 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:56,871 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [600354#(< i2 (* 2 N)), 600355#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:17:56,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:17:56,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:17:56,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:17:56,872 INFO L87 Difference]: Start difference. First operand 2170 states and 5839 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 21:17:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:17:56,978 INFO L93 Difference]: Finished difference Result 3096 states and 7462 transitions. [2022-03-15 21:17:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:17:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 23 [2022-03-15 21:17:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:17:56,982 INFO L225 Difference]: With dead ends: 3096 [2022-03-15 21:17:56,982 INFO L226 Difference]: Without dead ends: 3096 [2022-03-15 21:17:56,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:17:56,982 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:17:56,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:17:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2022-03-15 21:17:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2178. [2022-03-15 21:17:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.6931557188791917) internal successors, (5863), 2177 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:17:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 5863 transitions. [2022-03-15 21:17:57,007 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 5863 transitions. Word has length 23 [2022-03-15 21:17:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:17:57,007 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 5863 transitions. [2022-03-15 21:17:57,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 21:17:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 5863 transitions. [2022-03-15 21:17:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:17:57,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:17:57,009 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:17:57,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-15 21:17:57,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:57,225 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:17:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:17:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1894604886, now seen corresponding path program 141 times [2022-03-15 21:17:57,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:17:57,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556285434] [2022-03-15 21:17:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:17:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:17:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:17:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:17:57,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:17:57,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556285434] [2022-03-15 21:17:57,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556285434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:17:57,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014207353] [2022-03-15 21:17:57,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:17:57,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:17:57,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:17:57,302 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 21:17:57,303 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 21:17:57,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:17:57,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:17:57,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:17:57,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:17:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:17:57,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:17:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:17:57,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014207353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:17:57,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:17:57,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 26 [2022-03-15 21:17:57,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1087987315] [2022-03-15 21:17:57,506 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:17:57,507 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:17:57,513 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 77 transitions. [2022-03-15 21:17:57,513 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:17:57,904 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 18 new interpolants: [607989#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 607988#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 607983#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 607977#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 607982#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 607975#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 607981#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 607974#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 607980#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 607973#(< i1 (* 2 N)), 607976#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 607986#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 607978#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 607979#(< i2 (* 2 N)), 607930#(<= (* 2 N) (+ 6 i2)), 607984#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 607985#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 607987#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N)))] [2022-03-15 21:17:57,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:17:57,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:17:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:17:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1528, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:17:57,905 INFO L87 Difference]: Start difference. First operand 2178 states and 5863 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:00,492 INFO L93 Difference]: Finished difference Result 5097 states and 12341 transitions. [2022-03-15 21:18:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-15 21:18:00,492 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:18:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:00,499 INFO L225 Difference]: With dead ends: 5097 [2022-03-15 21:18:00,499 INFO L226 Difference]: Without dead ends: 4832 [2022-03-15 21:18:00,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9434 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4657, Invalid=23065, Unknown=0, NotChecked=0, Total=27722 [2022-03-15 21:18:00,501 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 461 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:00,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:18:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4832 states. [2022-03-15 21:18:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4832 to 3109. [2022-03-15 21:18:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3108 states have (on average 2.67020592020592) internal successors, (8299), 3108 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 8299 transitions. [2022-03-15 21:18:00,557 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 8299 transitions. Word has length 23 [2022-03-15 21:18:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:00,557 INFO L470 AbstractCegarLoop]: Abstraction has 3109 states and 8299 transitions. [2022-03-15 21:18:00,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 8299 transitions. [2022-03-15 21:18:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:18:00,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:00,560 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:00,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-15 21:18:00,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:00,775 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash -921217559, now seen corresponding path program 142 times [2022-03-15 21:18:00,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:00,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163604989] [2022-03-15 21:18:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:00,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:00,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:00,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163604989] [2022-03-15 21:18:00,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163604989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:00,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372960389] [2022-03-15 21:18:00,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:00,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:00,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:00,819 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 21:18:00,820 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 21:18:00,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:00,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:18:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:00,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:01,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372960389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:01,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:01,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 22 [2022-03-15 21:18:01,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898590561] [2022-03-15 21:18:01,013 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:01,014 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:01,019 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 75 transitions. [2022-03-15 21:18:01,019 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:01,265 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [619713#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 619712#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 619710#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 619707#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 619709#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 619711#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 619708#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 619714#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 619706#(< i2 (* 2 N))] [2022-03-15 21:18:01,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:18:01,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:18:01,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:18:01,266 INFO L87 Difference]: Start difference. First operand 3109 states and 8299 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 21:18:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:05,962 INFO L93 Difference]: Finished difference Result 6077 states and 13753 transitions. [2022-03-15 21:18:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-03-15 21:18:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 23 [2022-03-15 21:18:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:05,974 INFO L225 Difference]: With dead ends: 6077 [2022-03-15 21:18:05,974 INFO L226 Difference]: Without dead ends: 6077 [2022-03-15 21:18:05,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28357 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9632, Invalid=58750, Unknown=0, NotChecked=0, Total=68382 [2022-03-15 21:18:05,978 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 413 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:05,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:18:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2022-03-15 21:18:06,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 3313. [2022-03-15 21:18:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.681159420289855) internal successors, (8880), 3312 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 8880 transitions. [2022-03-15 21:18:06,035 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 8880 transitions. Word has length 23 [2022-03-15 21:18:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:06,035 INFO L470 AbstractCegarLoop]: Abstraction has 3313 states and 8880 transitions. [2022-03-15 21:18:06,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 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 21:18:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 8880 transitions. [2022-03-15 21:18:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:06,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:06,038 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:06,055 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 21:18:06,254 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,SelfDestructingSolverStorable144 [2022-03-15 21:18:06,255 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:06,255 INFO L85 PathProgramCache]: Analyzing trace with hash 259997443, now seen corresponding path program 143 times [2022-03-15 21:18:06,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:06,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688033277] [2022-03-15 21:18:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:06,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:06,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:06,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688033277] [2022-03-15 21:18:06,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688033277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:06,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941547803] [2022-03-15 21:18:06,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:06,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:06,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:06,335 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 21:18:06,336 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 21:18:06,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:18:06,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:06,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:06,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941547803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:06,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:06,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2022-03-15 21:18:06,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1123763222] [2022-03-15 21:18:06,516 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:06,518 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:06,522 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:18:06,522 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:06,742 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [633052#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 633058#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 633054#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 633053#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 633057#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 633059#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 633051#(< i2 (* 2 N)), 633055#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 633056#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4)))] [2022-03-15 21:18:06,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:18:06,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:18:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1004, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:18:06,742 INFO L87 Difference]: Start difference. First operand 3313 states and 8880 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 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 21:18:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:07,084 INFO L93 Difference]: Finished difference Result 5309 states and 13548 transitions. [2022-03-15 21:18:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:18:07,084 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:07,092 INFO L225 Difference]: With dead ends: 5309 [2022-03-15 21:18:07,092 INFO L226 Difference]: Without dead ends: 5300 [2022-03-15 21:18:07,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1008, Invalid=2184, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:18:07,093 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 221 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:07,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2022-03-15 21:18:07,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 3982. [2022-03-15 21:18:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3982 states, 3981 states have (on average 2.755589047977895) internal successors, (10970), 3981 states have internal predecessors, (10970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3982 states to 3982 states and 10970 transitions. [2022-03-15 21:18:07,176 INFO L78 Accepts]: Start accepts. Automaton has 3982 states and 10970 transitions. Word has length 25 [2022-03-15 21:18:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:07,176 INFO L470 AbstractCegarLoop]: Abstraction has 3982 states and 10970 transitions. [2022-03-15 21:18:07,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 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 21:18:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3982 states and 10970 transitions. [2022-03-15 21:18:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:07,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:07,180 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:07,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-15 21:18:07,383 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,SelfDestructingSolverStorable145 [2022-03-15 21:18:07,384 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1285442819, now seen corresponding path program 144 times [2022-03-15 21:18:07,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:07,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303727692] [2022-03-15 21:18:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:07,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:07,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:07,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303727692] [2022-03-15 21:18:07,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303727692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:07,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737301643] [2022-03-15 21:18:07,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:07,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:07,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:07,442 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 21:18:07,443 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 21:18:07,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:18:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:07,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:07,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:07,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737301643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:07,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:07,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 24 [2022-03-15 21:18:07,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [534505961] [2022-03-15 21:18:07,679 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:07,680 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:07,683 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2022-03-15 21:18:07,683 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:07,697 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [646540#(< i2 (* 2 N))] [2022-03-15 21:18:07,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:18:07,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:18:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:07,698 INFO L87 Difference]: Start difference. First operand 3982 states and 10970 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:07,869 INFO L93 Difference]: Finished difference Result 4973 states and 12723 transitions. [2022-03-15 21:18:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:18:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:07,876 INFO L225 Difference]: With dead ends: 4973 [2022-03-15 21:18:07,876 INFO L226 Difference]: Without dead ends: 4972 [2022-03-15 21:18:07,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=476, Invalid=784, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:18:07,876 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:07,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2022-03-15 21:18:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4014. [2022-03-15 21:18:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 2.7542985297782208) internal successors, (11053), 4013 states have internal predecessors, (11053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 11053 transitions. [2022-03-15 21:18:07,932 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 11053 transitions. Word has length 25 [2022-03-15 21:18:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:07,932 INFO L470 AbstractCegarLoop]: Abstraction has 4014 states and 11053 transitions. [2022-03-15 21:18:07,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 11053 transitions. [2022-03-15 21:18:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:07,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:07,936 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:07,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:08,147 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,SelfDestructingSolverStorable146 [2022-03-15 21:18:08,147 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash 786741479, now seen corresponding path program 145 times [2022-03-15 21:18:08,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:08,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47762289] [2022-03-15 21:18:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:08,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:08,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:08,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47762289] [2022-03-15 21:18:08,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47762289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:08,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064945241] [2022-03-15 21:18:08,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:08,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:08,195 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 21:18:08,195 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 21:18:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:08,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:08,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:08,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:08,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064945241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:08,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:08,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:18:08,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [176975782] [2022-03-15 21:18:08,414 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:08,416 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:08,419 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:08,419 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:08,452 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [659732#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:08,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:08,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:08,454 INFO L87 Difference]: Start difference. First operand 4014 states and 11053 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:08,601 INFO L93 Difference]: Finished difference Result 5951 states and 14735 transitions. [2022-03-15 21:18:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:18:08,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:08,612 INFO L225 Difference]: With dead ends: 5951 [2022-03-15 21:18:08,612 INFO L226 Difference]: Without dead ends: 5951 [2022-03-15 21:18:08,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=529, Invalid=953, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:18:08,613 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 125 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:08,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-03-15 21:18:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4018. [2022-03-15 21:18:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4018 states, 4017 states have (on average 2.754543191436395) internal successors, (11065), 4017 states have internal predecessors, (11065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4018 states to 4018 states and 11065 transitions. [2022-03-15 21:18:08,714 INFO L78 Accepts]: Start accepts. Automaton has 4018 states and 11065 transitions. Word has length 25 [2022-03-15 21:18:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:08,714 INFO L470 AbstractCegarLoop]: Abstraction has 4018 states and 11065 transitions. [2022-03-15 21:18:08,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4018 states and 11065 transitions. [2022-03-15 21:18:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:08,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:08,719 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:08,735 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 21:18:08,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:08,931 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1731605111, now seen corresponding path program 146 times [2022-03-15 21:18:08,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:08,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942269104] [2022-03-15 21:18:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:08,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:08,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:08,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942269104] [2022-03-15 21:18:08,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942269104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:08,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893006725] [2022-03-15 21:18:08,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:08,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:08,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:08,988 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 21:18:08,989 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 21:18:09,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:09,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:09,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:09,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:09,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:09,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893006725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:09,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:09,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 23 [2022-03-15 21:18:09,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [961721789] [2022-03-15 21:18:09,163 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:09,164 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:09,168 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:09,168 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:09,191 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [673913#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 673912#(< i2 (* 2 N))] [2022-03-15 21:18:09,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:09,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:09,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:09,191 INFO L87 Difference]: Start difference. First operand 4018 states and 11065 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:09,312 INFO L93 Difference]: Finished difference Result 4899 states and 12647 transitions. [2022-03-15 21:18:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:18:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:09,320 INFO L225 Difference]: With dead ends: 4899 [2022-03-15 21:18:09,320 INFO L226 Difference]: Without dead ends: 4897 [2022-03-15 21:18:09,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:18:09,321 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 130 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:09,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4897 states. [2022-03-15 21:18:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4897 to 4085. [2022-03-15 21:18:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 4084 states have (on average 2.767384916748286) internal successors, (11302), 4084 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 11302 transitions. [2022-03-15 21:18:09,382 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 11302 transitions. Word has length 25 [2022-03-15 21:18:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:09,382 INFO L470 AbstractCegarLoop]: Abstraction has 4085 states and 11302 transitions. [2022-03-15 21:18:09,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 11302 transitions. [2022-03-15 21:18:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:09,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:09,386 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:09,403 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 21:18:09,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:09,604 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -756179965, now seen corresponding path program 147 times [2022-03-15 21:18:09,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:09,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337512423] [2022-03-15 21:18:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:09,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:09,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:09,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337512423] [2022-03-15 21:18:09,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337512423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:09,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163513210] [2022-03-15 21:18:09,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:09,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:09,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:09,651 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 21:18:09,652 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 21:18:09,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:18:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:09,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:09,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:09,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163513210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:09,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:09,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 24 [2022-03-15 21:18:09,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1317295076] [2022-03-15 21:18:09,872 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:09,874 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:09,878 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2022-03-15 21:18:09,878 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:09,887 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [687172#(< i2 (* 2 N))] [2022-03-15 21:18:09,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:18:09,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:18:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:09,888 INFO L87 Difference]: Start difference. First operand 4085 states and 11302 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:10,026 INFO L93 Difference]: Finished difference Result 5461 states and 13869 transitions. [2022-03-15 21:18:10,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:18:10,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:10,035 INFO L225 Difference]: With dead ends: 5461 [2022-03-15 21:18:10,035 INFO L226 Difference]: Without dead ends: 5458 [2022-03-15 21:18:10,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=536, Invalid=870, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:18:10,036 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 134 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:10,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2022-03-15 21:18:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 4065. [2022-03-15 21:18:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 2.749261811023622) internal successors, (11173), 4064 states have internal predecessors, (11173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 11173 transitions. [2022-03-15 21:18:10,105 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 11173 transitions. Word has length 25 [2022-03-15 21:18:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:10,105 INFO L470 AbstractCegarLoop]: Abstraction has 4065 states and 11173 transitions. [2022-03-15 21:18:10,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 11173 transitions. [2022-03-15 21:18:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:10,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:10,110 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:10,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-15 21:18:10,311 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,SelfDestructingSolverStorable149 [2022-03-15 21:18:10,311 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1254881305, now seen corresponding path program 148 times [2022-03-15 21:18:10,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:10,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340996830] [2022-03-15 21:18:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:10,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:10,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:10,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340996830] [2022-03-15 21:18:10,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340996830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:10,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546513734] [2022-03-15 21:18:10,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:10,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:10,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:10,386 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 21:18:10,387 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 21:18:10,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:10,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:10,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:10,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546513734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:10,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:10,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:18:10,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1451922213] [2022-03-15 21:18:10,649 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:10,650 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:10,654 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:10,654 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:10,685 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [700958#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:10,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:10,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:10,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:10,686 INFO L87 Difference]: Start difference. First operand 4065 states and 11173 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:10,824 INFO L93 Difference]: Finished difference Result 5535 states and 13758 transitions. [2022-03-15 21:18:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:18:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:10,834 INFO L225 Difference]: With dead ends: 5535 [2022-03-15 21:18:10,834 INFO L226 Difference]: Without dead ends: 5535 [2022-03-15 21:18:10,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=527, Invalid=955, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:18:10,838 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 122 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:10,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2022-03-15 21:18:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4031. [2022-03-15 21:18:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4031 states, 4030 states have (on average 2.739950372208437) internal successors, (11042), 4030 states have internal predecessors, (11042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4031 states to 4031 states and 11042 transitions. [2022-03-15 21:18:10,898 INFO L78 Accepts]: Start accepts. Automaton has 4031 states and 11042 transitions. Word has length 25 [2022-03-15 21:18:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:10,898 INFO L470 AbstractCegarLoop]: Abstraction has 4031 states and 11042 transitions. [2022-03-15 21:18:10,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:10,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4031 states and 11042 transitions. [2022-03-15 21:18:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:10,903 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:10,903 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:10,919 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 21:18:11,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:11,118 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2110187959, now seen corresponding path program 149 times [2022-03-15 21:18:11,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:11,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642893347] [2022-03-15 21:18:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:11,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:11,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:11,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642893347] [2022-03-15 21:18:11,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642893347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:11,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285249900] [2022-03-15 21:18:11,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:11,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:11,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:11,169 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 21:18:11,195 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 21:18:11,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:18:11,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:11,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:11,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:11,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:11,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285249900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:11,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:11,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 25 [2022-03-15 21:18:11,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1892105034] [2022-03-15 21:18:11,458 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:11,459 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:11,463 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2022-03-15 21:18:11,463 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:11,545 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [714750#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 714751#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:18:11,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:18:11,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:11,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:18:11,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:18:11,546 INFO L87 Difference]: Start difference. First operand 4031 states and 11042 transitions. Second operand has 16 states, 16 states have (on average 2.0625) 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 21:18:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:11,851 INFO L93 Difference]: Finished difference Result 5950 states and 14694 transitions. [2022-03-15 21:18:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:18:11,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) 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 25 [2022-03-15 21:18:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:11,860 INFO L225 Difference]: With dead ends: 5950 [2022-03-15 21:18:11,861 INFO L226 Difference]: Without dead ends: 5950 [2022-03-15 21:18:11,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=620, Invalid=1272, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:18:11,861 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 134 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:11,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2022-03-15 21:18:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 4042. [2022-03-15 21:18:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 2.740658252907696) internal successors, (11075), 4041 states have internal predecessors, (11075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 11075 transitions. [2022-03-15 21:18:11,929 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 11075 transitions. Word has length 25 [2022-03-15 21:18:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:11,929 INFO L470 AbstractCegarLoop]: Abstraction has 4042 states and 11075 transitions. [2022-03-15 21:18:11,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) 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 21:18:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 11075 transitions. [2022-03-15 21:18:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:11,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:11,933 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:11,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-15 21:18:12,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:12,135 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1013538983, now seen corresponding path program 150 times [2022-03-15 21:18:12,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:12,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379126452] [2022-03-15 21:18:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:12,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:12,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379126452] [2022-03-15 21:18:12,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379126452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:12,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623073374] [2022-03-15 21:18:12,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:12,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:12,190 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 21:18:12,190 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 21:18:12,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:18:12,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:12,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:12,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623073374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:12,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:12,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 16] total 24 [2022-03-15 21:18:12,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1907047657] [2022-03-15 21:18:12,419 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:12,420 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:12,424 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:12,424 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:12,445 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [728988#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 728987#(< i2 (* 2 N))] [2022-03-15 21:18:12,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:12,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:12,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:12,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=436, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:12,446 INFO L87 Difference]: Start difference. First operand 4042 states and 11075 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:12,571 INFO L93 Difference]: Finished difference Result 5202 states and 13248 transitions. [2022-03-15 21:18:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:18:12,571 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:12,578 INFO L225 Difference]: With dead ends: 5202 [2022-03-15 21:18:12,578 INFO L226 Difference]: Without dead ends: 5200 [2022-03-15 21:18:12,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=534, Invalid=948, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:18:12,579 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 89 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:12,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5200 states. [2022-03-15 21:18:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5200 to 4106. [2022-03-15 21:18:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 4105 states have (on average 2.751766138855055) internal successors, (11296), 4105 states have internal predecessors, (11296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 11296 transitions. [2022-03-15 21:18:12,636 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 11296 transitions. Word has length 25 [2022-03-15 21:18:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:12,636 INFO L470 AbstractCegarLoop]: Abstraction has 4106 states and 11296 transitions. [2022-03-15 21:18:12,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 11296 transitions. [2022-03-15 21:18:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:12,640 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:12,641 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:12,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-15 21:18:12,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:12,856 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash 378023171, now seen corresponding path program 151 times [2022-03-15 21:18:12,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:12,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316830161] [2022-03-15 21:18:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:12,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:12,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316830161] [2022-03-15 21:18:12,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316830161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:12,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219161004] [2022-03-15 21:18:12,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:12,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:12,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:12,895 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 21:18:12,895 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 21:18:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:12,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:13,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219161004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:13,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:13,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 24 [2022-03-15 21:18:13,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [617102695] [2022-03-15 21:18:13,130 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:13,131 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:13,135 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2022-03-15 21:18:13,135 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:13,149 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [742596#(< i2 (* 2 N))] [2022-03-15 21:18:13,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:18:13,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:18:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:13,150 INFO L87 Difference]: Start difference. First operand 4106 states and 11296 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:13,379 INFO L93 Difference]: Finished difference Result 5771 states and 14511 transitions. [2022-03-15 21:18:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:18:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:13,387 INFO L225 Difference]: With dead ends: 5771 [2022-03-15 21:18:13,387 INFO L226 Difference]: Without dead ends: 5767 [2022-03-15 21:18:13,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:18:13,388 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 106 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:13,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2022-03-15 21:18:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 4099. [2022-03-15 21:18:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4099 states, 4098 states have (on average 2.7408491947291362) internal successors, (11232), 4098 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 11232 transitions. [2022-03-15 21:18:13,459 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 11232 transitions. Word has length 25 [2022-03-15 21:18:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:13,459 INFO L470 AbstractCegarLoop]: Abstraction has 4099 states and 11232 transitions. [2022-03-15 21:18:13,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 11232 transitions. [2022-03-15 21:18:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:13,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:13,463 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:13,479 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 21:18:13,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:13,679 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash -120678169, now seen corresponding path program 152 times [2022-03-15 21:18:13,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:13,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757606065] [2022-03-15 21:18:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:13,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:13,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:13,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757606065] [2022-03-15 21:18:13,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757606065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:13,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375040141] [2022-03-15 21:18:13,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:13,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:13,731 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 21:18:13,731 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 21:18:13,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:13,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:13,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:13,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:13,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375040141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:13,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:13,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:18:13,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [33124670] [2022-03-15 21:18:13,994 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:13,995 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:14,021 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:14,022 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:14,061 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [756764#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:14,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:14,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:14,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:14,062 INFO L87 Difference]: Start difference. First operand 4099 states and 11232 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:14,225 INFO L93 Difference]: Finished difference Result 6081 states and 14957 transitions. [2022-03-15 21:18:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:18:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:14,234 INFO L225 Difference]: With dead ends: 6081 [2022-03-15 21:18:14,234 INFO L226 Difference]: Without dead ends: 6077 [2022-03-15 21:18:14,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:18:14,234 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 117 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:14,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2022-03-15 21:18:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 4069. [2022-03-15 21:18:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 4068 states have (on average 2.735496558505408) internal successors, (11128), 4068 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 11128 transitions. [2022-03-15 21:18:14,297 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 11128 transitions. Word has length 25 [2022-03-15 21:18:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:14,297 INFO L470 AbstractCegarLoop]: Abstraction has 4069 states and 11128 transitions. [2022-03-15 21:18:14,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 11128 transitions. [2022-03-15 21:18:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:14,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:14,301 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:14,317 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 21:18:14,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:14,517 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:14,517 INFO L85 PathProgramCache]: Analyzing trace with hash -975984823, now seen corresponding path program 153 times [2022-03-15 21:18:14,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:14,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816396839] [2022-03-15 21:18:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:14,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:14,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:14,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816396839] [2022-03-15 21:18:14,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816396839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:14,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276400168] [2022-03-15 21:18:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:14,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:14,572 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 21:18:14,573 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 21:18:14,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:18:14,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:14,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:14,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276400168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:14,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:14,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 17] total 26 [2022-03-15 21:18:14,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1685766518] [2022-03-15 21:18:14,765 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:14,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:14,770 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2022-03-15 21:18:14,770 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:14,831 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [771183#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 771184#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:18:14,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:18:14,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:14,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:18:14,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:18:14,832 INFO L87 Difference]: Start difference. First operand 4069 states and 11128 transitions. Second operand has 16 states, 16 states have (on average 2.0625) 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 21:18:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:15,027 INFO L93 Difference]: Finished difference Result 5436 states and 13487 transitions. [2022-03-15 21:18:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:18:15,027 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) 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 25 [2022-03-15 21:18:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:15,035 INFO L225 Difference]: With dead ends: 5436 [2022-03-15 21:18:15,035 INFO L226 Difference]: Without dead ends: 5436 [2022-03-15 21:18:15,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=641, Invalid=1339, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:18:15,036 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 125 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:15,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2022-03-15 21:18:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 4018. [2022-03-15 21:18:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4018 states, 4017 states have (on average 2.7221807318894697) internal successors, (10935), 4017 states have internal predecessors, (10935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4018 states to 4018 states and 10935 transitions. [2022-03-15 21:18:15,093 INFO L78 Accepts]: Start accepts. Automaton has 4018 states and 10935 transitions. Word has length 25 [2022-03-15 21:18:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:15,093 INFO L470 AbstractCegarLoop]: Abstraction has 4018 states and 10935 transitions. [2022-03-15 21:18:15,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) 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 21:18:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4018 states and 10935 transitions. [2022-03-15 21:18:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:15,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:15,098 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:15,114 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 21:18:15,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-15 21:18:15,314 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1720687321, now seen corresponding path program 154 times [2022-03-15 21:18:15,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:15,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293658254] [2022-03-15 21:18:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:15,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:15,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:15,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293658254] [2022-03-15 21:18:15,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293658254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:15,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392853845] [2022-03-15 21:18:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:15,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:15,394 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 21:18:15,395 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 21:18:15,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:15,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:15,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:15,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392853845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:15,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:15,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 26 [2022-03-15 21:18:15,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [214211965] [2022-03-15 21:18:15,668 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:15,696 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:15,700 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2022-03-15 21:18:15,700 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:15,810 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [784861#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 784862#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 784860#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:15,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:18:15,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:18:15,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:18:15,810 INFO L87 Difference]: Start difference. First operand 4018 states and 10935 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:16,263 INFO L93 Difference]: Finished difference Result 5811 states and 14352 transitions. [2022-03-15 21:18:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:18:16,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 25 [2022-03-15 21:18:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:16,271 INFO L225 Difference]: With dead ends: 5811 [2022-03-15 21:18:16,271 INFO L226 Difference]: Without dead ends: 5811 [2022-03-15 21:18:16,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=990, Invalid=2316, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:18:16,272 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 147 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:16,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2022-03-15 21:18:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4036. [2022-03-15 21:18:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4036 states, 4035 states have (on average 2.723172242874845) internal successors, (10988), 4035 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4036 states to 4036 states and 10988 transitions. [2022-03-15 21:18:16,331 INFO L78 Accepts]: Start accepts. Automaton has 4036 states and 10988 transitions. Word has length 25 [2022-03-15 21:18:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:16,331 INFO L470 AbstractCegarLoop]: Abstraction has 4036 states and 10988 transitions. [2022-03-15 21:18:16,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4036 states and 10988 transitions. [2022-03-15 21:18:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:16,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:16,335 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:16,351 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 21:18:16,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:16,535 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash 213659977, now seen corresponding path program 155 times [2022-03-15 21:18:16,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:16,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515149770] [2022-03-15 21:18:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:16,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:16,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:16,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515149770] [2022-03-15 21:18:16,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515149770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:16,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043152673] [2022-03-15 21:18:16,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:16,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:16,599 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 21:18:16,599 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 21:18:16,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:18:16,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:16,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:16,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:16,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043152673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:16,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:16,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 23 [2022-03-15 21:18:16,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [122867260] [2022-03-15 21:18:16,836 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:16,837 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:16,841 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:16,841 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:16,865 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [798971#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 798970#(< i2 (* 2 N))] [2022-03-15 21:18:16,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:16,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:16,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:16,865 INFO L87 Difference]: Start difference. First operand 4036 states and 10988 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:17,009 INFO L93 Difference]: Finished difference Result 5368 states and 13539 transitions. [2022-03-15 21:18:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:18:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:17,017 INFO L225 Difference]: With dead ends: 5368 [2022-03-15 21:18:17,017 INFO L226 Difference]: Without dead ends: 5364 [2022-03-15 21:18:17,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=562, Invalid=998, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:18:17,017 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 130 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:17,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2022-03-15 21:18:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 4098. [2022-03-15 21:18:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 2.732975347815475) internal successors, (11197), 4097 states have internal predecessors, (11197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 11197 transitions. [2022-03-15 21:18:17,075 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 11197 transitions. Word has length 25 [2022-03-15 21:18:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:17,075 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 11197 transitions. [2022-03-15 21:18:17,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 11197 transitions. [2022-03-15 21:18:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:17,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:17,079 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:17,095 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 21:18:17,291 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,SelfDestructingSolverStorable157 [2022-03-15 21:18:17,291 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1178582019, now seen corresponding path program 156 times [2022-03-15 21:18:17,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:17,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762989507] [2022-03-15 21:18:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:17,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:17,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:17,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762989507] [2022-03-15 21:18:17,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762989507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:17,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62747047] [2022-03-15 21:18:17,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:17,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:17,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:17,344 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 21:18:17,344 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 21:18:17,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:18:17,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:17,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:17,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62747047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:17,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:17,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 24 [2022-03-15 21:18:17,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1955199552] [2022-03-15 21:18:17,565 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:17,566 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:17,569 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2022-03-15 21:18:17,570 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:17,579 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [812733#(< i2 (* 2 N))] [2022-03-15 21:18:17,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:18:17,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:18:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:17,579 INFO L87 Difference]: Start difference. First operand 4098 states and 11197 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:17,729 INFO L93 Difference]: Finished difference Result 5890 states and 14720 transitions. [2022-03-15 21:18:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:18:17,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:17,737 INFO L225 Difference]: With dead ends: 5890 [2022-03-15 21:18:17,738 INFO L226 Difference]: Without dead ends: 5886 [2022-03-15 21:18:17,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=644, Invalid=1078, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:18:17,738 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 110 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:17,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2022-03-15 21:18:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4096. [2022-03-15 21:18:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4096 states, 4095 states have (on average 2.725763125763126) internal successors, (11162), 4095 states have internal predecessors, (11162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4096 states to 4096 states and 11162 transitions. [2022-03-15 21:18:17,799 INFO L78 Accepts]: Start accepts. Automaton has 4096 states and 11162 transitions. Word has length 25 [2022-03-15 21:18:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:17,799 INFO L470 AbstractCegarLoop]: Abstraction has 4096 states and 11162 transitions. [2022-03-15 21:18:17,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4096 states and 11162 transitions. [2022-03-15 21:18:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:17,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:17,804 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:17,820 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 21:18:18,019 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,SelfDestructingSolverStorable158 [2022-03-15 21:18:18,019 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash 679880679, now seen corresponding path program 157 times [2022-03-15 21:18:18,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:18,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906217933] [2022-03-15 21:18:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:18,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:18,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906217933] [2022-03-15 21:18:18,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906217933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:18,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870239187] [2022-03-15 21:18:18,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:18,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:18,060 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 21:18:18,061 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 21:18:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:18,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:18,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:18,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870239187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:18,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:18,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:18:18,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [948504226] [2022-03-15 21:18:18,244 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:18,245 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:18,249 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:18,249 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:18,280 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [827018#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:18,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:18,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:18,281 INFO L87 Difference]: Start difference. First operand 4096 states and 11162 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:18,430 INFO L93 Difference]: Finished difference Result 6362 states and 15570 transitions. [2022-03-15 21:18:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:18:18,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:18,440 INFO L225 Difference]: With dead ends: 6362 [2022-03-15 21:18:18,440 INFO L226 Difference]: Without dead ends: 6358 [2022-03-15 21:18:18,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=604, Invalid=1118, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:18:18,440 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 106 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:18,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6358 states. [2022-03-15 21:18:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6358 to 4090. [2022-03-15 21:18:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 4089 states have (on average 2.7248716067498164) internal successors, (11142), 4089 states have internal predecessors, (11142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 11142 transitions. [2022-03-15 21:18:18,502 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 11142 transitions. Word has length 25 [2022-03-15 21:18:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:18,502 INFO L470 AbstractCegarLoop]: Abstraction has 4090 states and 11142 transitions. [2022-03-15 21:18:18,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 11142 transitions. [2022-03-15 21:18:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:18,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:18,506 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:18,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:18,722 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,SelfDestructingSolverStorable159 [2022-03-15 21:18:18,723 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:18,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash -175425975, now seen corresponding path program 158 times [2022-03-15 21:18:18,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:18,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982334355] [2022-03-15 21:18:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:18,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:18,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:18,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982334355] [2022-03-15 21:18:18,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982334355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:18,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681805615] [2022-03-15 21:18:18,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:18,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:18,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:18,782 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 21:18:18,783 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 21:18:18,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:18,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:18,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:19,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681805615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:19,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:19,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 25 [2022-03-15 21:18:19,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [68735134] [2022-03-15 21:18:19,007 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:19,008 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:19,011 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2022-03-15 21:18:19,012 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:19,104 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [841761#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 841762#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:18:19,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:18:19,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:18:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:18:19,105 INFO L87 Difference]: Start difference. First operand 4090 states and 11142 transitions. Second operand has 16 states, 16 states have (on average 2.0625) 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 21:18:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:19,354 INFO L93 Difference]: Finished difference Result 6051 states and 14837 transitions. [2022-03-15 21:18:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:18:19,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) 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 25 [2022-03-15 21:18:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:19,362 INFO L225 Difference]: With dead ends: 6051 [2022-03-15 21:18:19,362 INFO L226 Difference]: Without dead ends: 6045 [2022-03-15 21:18:19,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:18:19,362 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 119 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:19,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6045 states. [2022-03-15 21:18:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6045 to 4068. [2022-03-15 21:18:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 4067 states have (on average 2.721416277354315) internal successors, (11068), 4067 states have internal predecessors, (11068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 11068 transitions. [2022-03-15 21:18:19,421 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 11068 transitions. Word has length 25 [2022-03-15 21:18:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:19,421 INFO L470 AbstractCegarLoop]: Abstraction has 4068 states and 11068 transitions. [2022-03-15 21:18:19,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) 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 21:18:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 11068 transitions. [2022-03-15 21:18:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:19,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:19,425 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:19,441 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 21:18:19,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:19,627 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash -920128473, now seen corresponding path program 159 times [2022-03-15 21:18:19,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:19,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191141280] [2022-03-15 21:18:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:19,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:19,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191141280] [2022-03-15 21:18:19,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191141280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:19,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408911286] [2022-03-15 21:18:19,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:19,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:19,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:19,715 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 21:18:19,715 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 21:18:19,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:18:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:19,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:19,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:19,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408911286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:19,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:19,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 26 [2022-03-15 21:18:19,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1237086073] [2022-03-15 21:18:19,962 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:19,963 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:19,967 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2022-03-15 21:18:19,967 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:20,081 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [856159#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 856160#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 856161#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:18:20,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:18:20,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:18:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:18:20,082 INFO L87 Difference]: Start difference. First operand 4068 states and 11068 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:20,517 INFO L93 Difference]: Finished difference Result 5290 states and 13137 transitions. [2022-03-15 21:18:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:18:20,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 25 [2022-03-15 21:18:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:20,524 INFO L225 Difference]: With dead ends: 5290 [2022-03-15 21:18:20,525 INFO L226 Difference]: Without dead ends: 5290 [2022-03-15 21:18:20,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=961, Invalid=2345, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:18:20,525 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 132 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:20,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5290 states. [2022-03-15 21:18:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5290 to 4010. [2022-03-15 21:18:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4009 states have (on average 2.706410576203542) internal successors, (10850), 4009 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 10850 transitions. [2022-03-15 21:18:20,578 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 10850 transitions. Word has length 25 [2022-03-15 21:18:20,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:20,579 INFO L470 AbstractCegarLoop]: Abstraction has 4010 states and 10850 transitions. [2022-03-15 21:18:20,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 10850 transitions. [2022-03-15 21:18:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:20,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:20,582 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:20,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:20,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:20,796 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1763897865, now seen corresponding path program 160 times [2022-03-15 21:18:20,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:20,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838122675] [2022-03-15 21:18:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:20,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:20,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838122675] [2022-03-15 21:18:20,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838122675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:20,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987137284] [2022-03-15 21:18:20,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:20,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:20,884 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 21:18:20,884 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 21:18:20,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:20,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:20,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:20,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:20,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:21,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987137284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:21,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:21,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17] total 26 [2022-03-15 21:18:21,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1908883908] [2022-03-15 21:18:21,145 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:21,147 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:21,151 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 45 transitions. [2022-03-15 21:18:21,151 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:21,288 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [869700#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 869702#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 869699#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 869701#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:18:21,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:18:21,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:18:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:18:21,289 INFO L87 Difference]: Start difference. First operand 4010 states and 10850 transitions. Second operand has 20 states, 20 states have (on average 1.95) 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 21:18:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:21,735 INFO L93 Difference]: Finished difference Result 5575 states and 13830 transitions. [2022-03-15 21:18:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:18:21,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) 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 25 [2022-03-15 21:18:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:21,742 INFO L225 Difference]: With dead ends: 5575 [2022-03-15 21:18:21,742 INFO L226 Difference]: Without dead ends: 5575 [2022-03-15 21:18:21,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1059, Invalid=2601, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:18:21,743 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 149 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:21,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2022-03-15 21:18:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 4034. [2022-03-15 21:18:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 4033 states have (on average 2.7079097446069924) internal successors, (10921), 4033 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 10921 transitions. [2022-03-15 21:18:21,799 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 10921 transitions. Word has length 25 [2022-03-15 21:18:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:21,799 INFO L470 AbstractCegarLoop]: Abstraction has 4034 states and 10921 transitions. [2022-03-15 21:18:21,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) 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 21:18:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 10921 transitions. [2022-03-15 21:18:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:21,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:21,803 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:21,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:22,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:22,011 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1187214567, now seen corresponding path program 161 times [2022-03-15 21:18:22,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:22,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414910264] [2022-03-15 21:18:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:22,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:22,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414910264] [2022-03-15 21:18:22,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414910264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:22,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861292682] [2022-03-15 21:18:22,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:22,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:22,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:22,077 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 21:18:22,080 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 21:18:22,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:18:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:22,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:22,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:22,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861292682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:22,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:22,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 16] total 24 [2022-03-15 21:18:22,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1798680774] [2022-03-15 21:18:22,328 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:22,330 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:22,334 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:22,334 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:22,373 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [883575#(< i2 (* 2 N)), 883576#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:18:22,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:22,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:22,374 INFO L87 Difference]: Start difference. First operand 4034 states and 10921 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:22,607 INFO L93 Difference]: Finished difference Result 5401 states and 13572 transitions. [2022-03-15 21:18:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:18:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:22,615 INFO L225 Difference]: With dead ends: 5401 [2022-03-15 21:18:22,615 INFO L226 Difference]: Without dead ends: 5397 [2022-03-15 21:18:22,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=649, Invalid=1157, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:18:22,615 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 100 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:22,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2022-03-15 21:18:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4095. [2022-03-15 21:18:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4095 states, 4094 states have (on average 2.7164142647777236) internal successors, (11121), 4094 states have internal predecessors, (11121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 11121 transitions. [2022-03-15 21:18:22,673 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 11121 transitions. Word has length 25 [2022-03-15 21:18:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:22,673 INFO L470 AbstractCegarLoop]: Abstraction has 4095 states and 11121 transitions. [2022-03-15 21:18:22,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 11121 transitions. [2022-03-15 21:18:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:22,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:22,677 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:22,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-15 21:18:22,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:22,893 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash 226102531, now seen corresponding path program 162 times [2022-03-15 21:18:22,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:22,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128446651] [2022-03-15 21:18:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:22,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:22,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:22,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128446651] [2022-03-15 21:18:22,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128446651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:22,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307573716] [2022-03-15 21:18:22,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:22,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:22,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:22,943 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 21:18:22,944 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 21:18:22,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:18:22,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:22,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:22,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:23,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:23,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307573716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:23,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:23,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 24 [2022-03-15 21:18:23,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2011748006] [2022-03-15 21:18:23,178 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:23,179 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:23,183 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2022-03-15 21:18:23,183 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:23,193 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [897369#(< i2 (* 2 N))] [2022-03-15 21:18:23,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:18:23,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:18:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:23,193 INFO L87 Difference]: Start difference. First operand 4095 states and 11121 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:23,367 INFO L93 Difference]: Finished difference Result 5866 states and 14628 transitions. [2022-03-15 21:18:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:18:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:23,375 INFO L225 Difference]: With dead ends: 5866 [2022-03-15 21:18:23,376 INFO L226 Difference]: Without dead ends: 5862 [2022-03-15 21:18:23,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=693, Invalid=1199, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:18:23,376 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 110 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:23,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2022-03-15 21:18:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 4093. [2022-03-15 21:18:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 2.710654936461388) internal successors, (11092), 4092 states have internal predecessors, (11092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11092 transitions. [2022-03-15 21:18:23,456 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11092 transitions. Word has length 25 [2022-03-15 21:18:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:23,456 INFO L470 AbstractCegarLoop]: Abstraction has 4093 states and 11092 transitions. [2022-03-15 21:18:23,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11092 transitions. [2022-03-15 21:18:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:23,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:23,461 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:23,477 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 21:18:23,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:23,677 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash -272598809, now seen corresponding path program 163 times [2022-03-15 21:18:23,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:23,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612223232] [2022-03-15 21:18:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:23,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:23,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:23,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612223232] [2022-03-15 21:18:23,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612223232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:23,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960610887] [2022-03-15 21:18:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:23,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:23,733 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 21:18:23,733 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 21:18:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:23,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:23,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960610887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:23,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:23,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:18:23,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1517075453] [2022-03-15 21:18:23,927 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:23,929 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:23,932 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:23,932 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:23,963 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [911628#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:23,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:23,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:23,964 INFO L87 Difference]: Start difference. First operand 4093 states and 11092 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:24,113 INFO L93 Difference]: Finished difference Result 6402 states and 15651 transitions. [2022-03-15 21:18:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:18:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:24,122 INFO L225 Difference]: With dead ends: 6402 [2022-03-15 21:18:24,122 INFO L226 Difference]: Without dead ends: 6398 [2022-03-15 21:18:24,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=625, Invalid=1181, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:18:24,123 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 121 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:24,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6398 states. [2022-03-15 21:18:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6398 to 4093. [2022-03-15 21:18:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 2.7108993157380255) internal successors, (11093), 4092 states have internal predecessors, (11093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11093 transitions. [2022-03-15 21:18:24,186 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11093 transitions. Word has length 25 [2022-03-15 21:18:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:24,186 INFO L470 AbstractCegarLoop]: Abstraction has 4093 states and 11093 transitions. [2022-03-15 21:18:24,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11093 transitions. [2022-03-15 21:18:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:24,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:24,190 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:24,207 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 21:18:24,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:24,404 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1127905463, now seen corresponding path program 164 times [2022-03-15 21:18:24,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:24,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107035061] [2022-03-15 21:18:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:24,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:24,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107035061] [2022-03-15 21:18:24,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107035061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:24,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432031783] [2022-03-15 21:18:24,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:24,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:24,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:24,454 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 21:18:24,454 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 21:18:24,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:24,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:24,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:24,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 51 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:24,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:24,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432031783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:24,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:24,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 17] total 26 [2022-03-15 21:18:24,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [637255817] [2022-03-15 21:18:24,636 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:24,637 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:24,641 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2022-03-15 21:18:24,641 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:24,691 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [926420#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 926421#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:18:24,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:18:24,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:18:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:18:24,692 INFO L87 Difference]: Start difference. First operand 4093 states and 11093 transitions. Second operand has 16 states, 16 states have (on average 2.0625) 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 21:18:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:24,913 INFO L93 Difference]: Finished difference Result 6351 states and 15493 transitions. [2022-03-15 21:18:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:18:24,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) 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 25 [2022-03-15 21:18:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:24,922 INFO L225 Difference]: With dead ends: 6351 [2022-03-15 21:18:24,922 INFO L226 Difference]: Without dead ends: 6345 [2022-03-15 21:18:24,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=778, Invalid=1672, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:18:24,923 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 132 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:24,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2022-03-15 21:18:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4095. [2022-03-15 21:18:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4095 states, 4094 states have (on average 2.7110405471421593) internal successors, (11099), 4094 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 11099 transitions. [2022-03-15 21:18:24,985 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 11099 transitions. Word has length 25 [2022-03-15 21:18:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:24,986 INFO L470 AbstractCegarLoop]: Abstraction has 4095 states and 11099 transitions. [2022-03-15 21:18:24,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) 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 21:18:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 11099 transitions. [2022-03-15 21:18:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:25,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:25,004 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:25,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:25,211 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,SelfDestructingSolverStorable166 [2022-03-15 21:18:25,211 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1872607961, now seen corresponding path program 165 times [2022-03-15 21:18:25,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:25,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161589122] [2022-03-15 21:18:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:25,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:25,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161589122] [2022-03-15 21:18:25,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161589122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:25,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91850456] [2022-03-15 21:18:25,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:25,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:25,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:25,280 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 21:18:25,281 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 21:18:25,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:18:25,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:25,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:25,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:25,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91850456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:25,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:25,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 26 [2022-03-15 21:18:25,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [207730851] [2022-03-15 21:18:25,556 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:25,557 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:25,561 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2022-03-15 21:18:25,562 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:25,671 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [941177#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 941178#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 941176#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:25,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:18:25,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:18:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:18:25,672 INFO L87 Difference]: Start difference. First operand 4095 states and 11099 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:26,146 INFO L93 Difference]: Finished difference Result 5928 states and 14535 transitions. [2022-03-15 21:18:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:18:26,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 25 [2022-03-15 21:18:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:26,155 INFO L225 Difference]: With dead ends: 5928 [2022-03-15 21:18:26,155 INFO L226 Difference]: Without dead ends: 5920 [2022-03-15 21:18:26,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2698, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:18:26,156 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 136 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:26,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5920 states. [2022-03-15 21:18:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5920 to 4066. [2022-03-15 21:18:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 4065 states have (on average 2.7104551045510457) internal successors, (11018), 4065 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 11018 transitions. [2022-03-15 21:18:26,216 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 11018 transitions. Word has length 25 [2022-03-15 21:18:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:26,216 INFO L470 AbstractCegarLoop]: Abstraction has 4066 states and 11018 transitions. [2022-03-15 21:18:26,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 11018 transitions. [2022-03-15 21:18:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:26,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:26,220 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:26,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:26,420 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,SelfDestructingSolverStorable167 [2022-03-15 21:18:26,420 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:26,421 INFO L85 PathProgramCache]: Analyzing trace with hash 811418377, now seen corresponding path program 166 times [2022-03-15 21:18:26,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:26,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451109746] [2022-03-15 21:18:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:26,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:26,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:26,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451109746] [2022-03-15 21:18:26,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451109746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:26,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884822740] [2022-03-15 21:18:26,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:26,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:26,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:26,508 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 21:18:26,509 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 21:18:26,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:26,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:26,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:26,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:26,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884822740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:26,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:26,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-03-15 21:18:26,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1563011915] [2022-03-15 21:18:26,788 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:26,789 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:26,793 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 45 transitions. [2022-03-15 21:18:26,793 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:26,936 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [955475#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 955478#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 955476#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 955477#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:18:26,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:18:26,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:26,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:18:26,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=704, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:18:26,937 INFO L87 Difference]: Start difference. First operand 4066 states and 11018 transitions. Second operand has 20 states, 20 states have (on average 1.95) 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 21:18:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:27,418 INFO L93 Difference]: Finished difference Result 5127 states and 12773 transitions. [2022-03-15 21:18:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:18:27,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) 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 25 [2022-03-15 21:18:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:27,425 INFO L225 Difference]: With dead ends: 5127 [2022-03-15 21:18:27,425 INFO L226 Difference]: Without dead ends: 5127 [2022-03-15 21:18:27,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1064, Invalid=2718, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:18:27,425 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 134 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:27,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5127 states. [2022-03-15 21:18:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5127 to 3986. [2022-03-15 21:18:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3985 states have (on average 2.6961104140526975) internal successors, (10744), 3985 states have internal predecessors, (10744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 10744 transitions. [2022-03-15 21:18:27,479 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 10744 transitions. Word has length 25 [2022-03-15 21:18:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:27,479 INFO L470 AbstractCegarLoop]: Abstraction has 3986 states and 10744 transitions. [2022-03-15 21:18:27,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) 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 21:18:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 10744 transitions. [2022-03-15 21:18:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:27,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:27,483 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:27,499 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 21:18:27,698 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,SelfDestructingSolverStorable168 [2022-03-15 21:18:27,699 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:27,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1883111065, now seen corresponding path program 167 times [2022-03-15 21:18:27,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:27,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142172275] [2022-03-15 21:18:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:27,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:27,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142172275] [2022-03-15 21:18:27,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142172275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:27,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165639784] [2022-03-15 21:18:27,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:27,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:27,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:27,759 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 21:18:27,773 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 21:18:27,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:18:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:27,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:27,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165639784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:27,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:27,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2022-03-15 21:18:27,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [890737119] [2022-03-15 21:18:27,943 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:27,945 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:27,949 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 49 transitions. [2022-03-15 21:18:27,949 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:28,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [968813#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 968810#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 968811#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 968814#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 968812#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:18:28,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:18:28,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:28,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:18:28,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:18:28,063 INFO L87 Difference]: Start difference. First operand 3986 states and 10744 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) 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 21:18:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:28,617 INFO L93 Difference]: Finished difference Result 5305 states and 13243 transitions. [2022-03-15 21:18:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 21:18:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) 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 25 [2022-03-15 21:18:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:28,624 INFO L225 Difference]: With dead ends: 5305 [2022-03-15 21:18:28,624 INFO L226 Difference]: Without dead ends: 5305 [2022-03-15 21:18:28,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1719, Invalid=4601, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:18:28,625 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 160 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:28,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5305 states. [2022-03-15 21:18:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5305 to 4016. [2022-03-15 21:18:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4016 states, 4015 states have (on average 2.69813200498132) internal successors, (10833), 4015 states have internal predecessors, (10833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4016 states to 4016 states and 10833 transitions. [2022-03-15 21:18:28,678 INFO L78 Accepts]: Start accepts. Automaton has 4016 states and 10833 transitions. Word has length 25 [2022-03-15 21:18:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:28,678 INFO L470 AbstractCegarLoop]: Abstraction has 4016 states and 10833 transitions. [2022-03-15 21:18:28,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) 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 21:18:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4016 states and 10833 transitions. [2022-03-15 21:18:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:28,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:28,682 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:28,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-15 21:18:28,898 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,SelfDestructingSolverStorable169 [2022-03-15 21:18:28,898 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1302635785, now seen corresponding path program 168 times [2022-03-15 21:18:28,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:28,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107614634] [2022-03-15 21:18:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:28,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:28,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:28,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107614634] [2022-03-15 21:18:28,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107614634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:28,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569226141] [2022-03-15 21:18:28,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:28,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:28,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:28,937 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 21:18:28,937 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 21:18:28,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:18:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:28,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:18:28,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:29,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569226141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:29,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:29,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 23 [2022-03-15 21:18:29,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [36048625] [2022-03-15 21:18:29,104 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:29,105 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:29,109 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:29,109 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:29,129 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [982415#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 982414#(< i2 (* 2 N))] [2022-03-15 21:18:29,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:29,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=398, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:29,130 INFO L87 Difference]: Start difference. First operand 4016 states and 10833 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:29,284 INFO L93 Difference]: Finished difference Result 5294 states and 13327 transitions. [2022-03-15 21:18:29,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:18:29,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:29,291 INFO L225 Difference]: With dead ends: 5294 [2022-03-15 21:18:29,292 INFO L226 Difference]: Without dead ends: 5290 [2022-03-15 21:18:29,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=665, Invalid=1227, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:18:29,292 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:29,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5290 states. [2022-03-15 21:18:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5290 to 3903. [2022-03-15 21:18:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.6858021527421836) internal successors, (10480), 3902 states have internal predecessors, (10480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10480 transitions. [2022-03-15 21:18:29,349 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10480 transitions. Word has length 25 [2022-03-15 21:18:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:29,349 INFO L470 AbstractCegarLoop]: Abstraction has 3903 states and 10480 transitions. [2022-03-15 21:18:29,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10480 transitions. [2022-03-15 21:18:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:29,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:29,353 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:29,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:29,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:29,570 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:29,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:29,570 INFO L85 PathProgramCache]: Analyzing trace with hash 764009475, now seen corresponding path program 169 times [2022-03-15 21:18:29,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:29,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315371384] [2022-03-15 21:18:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:29,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:29,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:29,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315371384] [2022-03-15 21:18:29,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315371384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:29,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108807627] [2022-03-15 21:18:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:29,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:29,609 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 21:18:29,610 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 21:18:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:29,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:29,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:29,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:29,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108807627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:29,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:29,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 24 [2022-03-15 21:18:29,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1331434953] [2022-03-15 21:18:29,824 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:29,825 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:29,829 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2022-03-15 21:18:29,829 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:29,843 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [995721#(< i2 (* 2 N))] [2022-03-15 21:18:29,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:18:29,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:29,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:18:29,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:29,844 INFO L87 Difference]: Start difference. First operand 3903 states and 10480 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:30,099 INFO L93 Difference]: Finished difference Result 5438 states and 13446 transitions. [2022-03-15 21:18:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:18:30,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:30,106 INFO L225 Difference]: With dead ends: 5438 [2022-03-15 21:18:30,107 INFO L226 Difference]: Without dead ends: 5434 [2022-03-15 21:18:30,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=740, Invalid=1330, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:18:30,107 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 132 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:30,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2022-03-15 21:18:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3901. [2022-03-15 21:18:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.6825641025641027) internal successors, (10462), 3900 states have internal predecessors, (10462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 10462 transitions. [2022-03-15 21:18:30,165 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 10462 transitions. Word has length 25 [2022-03-15 21:18:30,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:30,171 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 10462 transitions. [2022-03-15 21:18:30,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 10462 transitions. [2022-03-15 21:18:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:30,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:30,176 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:30,191 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 21:18:30,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:30,392 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:30,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash 265308135, now seen corresponding path program 170 times [2022-03-15 21:18:30,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:30,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232073277] [2022-03-15 21:18:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:30,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:30,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232073277] [2022-03-15 21:18:30,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232073277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:30,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365934736] [2022-03-15 21:18:30,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:30,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:30,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:30,433 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 21:18:30,433 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 21:18:30,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:30,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:30,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:30,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:30,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 50 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:30,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365934736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:30,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:30,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:18:30,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1924945732] [2022-03-15 21:18:30,615 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:30,616 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:30,619 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:30,619 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:30,651 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1009172#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:30,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:30,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:30,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:30,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:30,652 INFO L87 Difference]: Start difference. First operand 3901 states and 10462 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:30,811 INFO L93 Difference]: Finished difference Result 5868 states and 14238 transitions. [2022-03-15 21:18:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:18:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:30,818 INFO L225 Difference]: With dead ends: 5868 [2022-03-15 21:18:30,819 INFO L226 Difference]: Without dead ends: 5864 [2022-03-15 21:18:30,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=647, Invalid=1245, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:18:30,819 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 99 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:30,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5864 states. [2022-03-15 21:18:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5864 to 3904. [2022-03-15 21:18:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.682295669997438) internal successors, (10469), 3903 states have internal predecessors, (10469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 10469 transitions. [2022-03-15 21:18:30,876 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 10469 transitions. Word has length 25 [2022-03-15 21:18:30,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:30,876 INFO L470 AbstractCegarLoop]: Abstraction has 3904 states and 10469 transitions. [2022-03-15 21:18:30,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:30,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 10469 transitions. [2022-03-15 21:18:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:30,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:30,880 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:30,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-15 21:18:31,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:31,096 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:31,097 INFO L85 PathProgramCache]: Analyzing trace with hash -589998519, now seen corresponding path program 171 times [2022-03-15 21:18:31,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:31,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364521041] [2022-03-15 21:18:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:31,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:31,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:31,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364521041] [2022-03-15 21:18:31,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364521041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:31,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887815596] [2022-03-15 21:18:31,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:31,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:31,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:31,165 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 21:18:31,165 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 21:18:31,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:18:31,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:31,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:31,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:31,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 49 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:31,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887815596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:31,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:31,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 25 [2022-03-15 21:18:31,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [580827701] [2022-03-15 21:18:31,388 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:31,389 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:31,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2022-03-15 21:18:31,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:31,443 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1023053#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1023054#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:18:31,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:18:31,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:31,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:18:31,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:18:31,444 INFO L87 Difference]: Start difference. First operand 3904 states and 10469 transitions. Second operand has 16 states, 16 states have (on average 2.0625) 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 21:18:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:31,664 INFO L93 Difference]: Finished difference Result 5978 states and 14419 transitions. [2022-03-15 21:18:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:18:31,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) 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 25 [2022-03-15 21:18:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:31,672 INFO L225 Difference]: With dead ends: 5978 [2022-03-15 21:18:31,673 INFO L226 Difference]: Without dead ends: 5972 [2022-03-15 21:18:31,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=793, Invalid=1757, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:18:31,673 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 108 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:31,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2022-03-15 21:18:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 3910. [2022-03-15 21:18:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3909 states have (on average 2.682783320542338) internal successors, (10487), 3909 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 10487 transitions. [2022-03-15 21:18:31,746 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 10487 transitions. Word has length 25 [2022-03-15 21:18:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:31,746 INFO L470 AbstractCegarLoop]: Abstraction has 3910 states and 10487 transitions. [2022-03-15 21:18:31,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) 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 21:18:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 10487 transitions. [2022-03-15 21:18:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:31,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:31,750 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:31,779 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 21:18:31,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:31,966 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1334701017, now seen corresponding path program 172 times [2022-03-15 21:18:31,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:31,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094828729] [2022-03-15 21:18:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:31,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:32,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:32,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094828729] [2022-03-15 21:18:32,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094828729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:32,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795768627] [2022-03-15 21:18:32,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:32,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:32,016 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 21:18:32,017 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 21:18:32,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:32,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:32,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:32,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795768627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:32,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:32,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 26 [2022-03-15 21:18:32,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [427979177] [2022-03-15 21:18:32,194 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:32,195 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:32,199 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2022-03-15 21:18:32,199 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:32,268 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1037071#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1037070#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1037072#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:18:32,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:18:32,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:18:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:18:32,269 INFO L87 Difference]: Start difference. First operand 3910 states and 10487 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:32,592 INFO L93 Difference]: Finished difference Result 5819 states and 14045 transitions. [2022-03-15 21:18:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:18:32,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 25 [2022-03-15 21:18:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:32,598 INFO L225 Difference]: With dead ends: 5819 [2022-03-15 21:18:32,599 INFO L226 Difference]: Without dead ends: 5811 [2022-03-15 21:18:32,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1135, Invalid=2897, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:18:32,599 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 152 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:32,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2022-03-15 21:18:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 3902. [2022-03-15 21:18:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3902 states, 3901 states have (on average 2.6844398872084083) internal successors, (10472), 3901 states have internal predecessors, (10472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 10472 transitions. [2022-03-15 21:18:32,648 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 10472 transitions. Word has length 25 [2022-03-15 21:18:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:32,648 INFO L470 AbstractCegarLoop]: Abstraction has 3902 states and 10472 transitions. [2022-03-15 21:18:32,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 10472 transitions. [2022-03-15 21:18:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:32,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:32,652 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:32,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:32,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:32,868 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1349325321, now seen corresponding path program 173 times [2022-03-15 21:18:32,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:32,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952243061] [2022-03-15 21:18:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:32,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:32,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952243061] [2022-03-15 21:18:32,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952243061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:32,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181500084] [2022-03-15 21:18:32,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:32,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:32,923 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 21:18:32,924 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 21:18:32,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:18:32,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:32,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:32,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:33,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181500084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:33,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:33,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17] total 26 [2022-03-15 21:18:33,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1147357315] [2022-03-15 21:18:33,103 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:33,104 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:33,108 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 45 transitions. [2022-03-15 21:18:33,108 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:33,197 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1050935#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1050936#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1050938#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 1050937#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:18:33,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:18:33,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:33,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:18:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:18:33,197 INFO L87 Difference]: Start difference. First operand 3902 states and 10472 transitions. Second operand has 20 states, 20 states have (on average 1.95) 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 21:18:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:33,558 INFO L93 Difference]: Finished difference Result 5392 states and 13145 transitions. [2022-03-15 21:18:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:18:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) 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 25 [2022-03-15 21:18:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:33,567 INFO L225 Difference]: With dead ends: 5392 [2022-03-15 21:18:33,568 INFO L226 Difference]: Without dead ends: 5382 [2022-03-15 21:18:33,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1167, Invalid=2993, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:18:33,568 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 169 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:33,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5382 states. [2022-03-15 21:18:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5382 to 3865. [2022-03-15 21:18:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3865 states, 3864 states have (on average 2.6868530020703933) internal successors, (10382), 3864 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 10382 transitions. [2022-03-15 21:18:33,643 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 10382 transitions. Word has length 25 [2022-03-15 21:18:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:33,643 INFO L470 AbstractCegarLoop]: Abstraction has 3865 states and 10382 transitions. [2022-03-15 21:18:33,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) 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 21:18:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 10382 transitions. [2022-03-15 21:18:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:33,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:33,647 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:33,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:33,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:33,862 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1345204121, now seen corresponding path program 174 times [2022-03-15 21:18:33,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:33,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607711496] [2022-03-15 21:18:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:33,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:33,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:33,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607711496] [2022-03-15 21:18:33,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607711496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:33,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134557423] [2022-03-15 21:18:33,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:33,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:33,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:33,920 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 21:18:33,921 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 21:18:33,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:18:33,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:33,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:33,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:33,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:34,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134557423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:34,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:34,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2022-03-15 21:18:34,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [749556106] [2022-03-15 21:18:34,098 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:34,099 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:34,103 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 49 transitions. [2022-03-15 21:18:34,104 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:34,214 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1064304#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 1064301#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1064305#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 1064303#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1064302#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:18:34,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:18:34,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:18:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:18:34,215 INFO L87 Difference]: Start difference. First operand 3865 states and 10382 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) 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 21:18:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:34,714 INFO L93 Difference]: Finished difference Result 4770 states and 11865 transitions. [2022-03-15 21:18:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 21:18:34,715 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) 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 25 [2022-03-15 21:18:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:34,721 INFO L225 Difference]: With dead ends: 4770 [2022-03-15 21:18:34,721 INFO L226 Difference]: Without dead ends: 4770 [2022-03-15 21:18:34,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1587, Invalid=4419, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:18:34,722 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 132 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:34,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2022-03-15 21:18:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 3818. [2022-03-15 21:18:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3818 states, 3817 states have (on average 2.680901231333508) internal successors, (10233), 3817 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 10233 transitions. [2022-03-15 21:18:34,771 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 10233 transitions. Word has length 25 [2022-03-15 21:18:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:34,771 INFO L470 AbstractCegarLoop]: Abstraction has 3818 states and 10233 transitions. [2022-03-15 21:18:34,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) 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 21:18:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 10233 transitions. [2022-03-15 21:18:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:34,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:34,775 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:34,792 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 21:18:34,991 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,SelfDestructingSolverStorable176 [2022-03-15 21:18:34,992 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:34,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1023729097, now seen corresponding path program 175 times [2022-03-15 21:18:34,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:34,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82308062] [2022-03-15 21:18:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:34,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:35,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:35,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82308062] [2022-03-15 21:18:35,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82308062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:35,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571920843] [2022-03-15 21:18:35,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:35,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:35,056 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 21:18:35,057 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 21:18:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:35,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:35,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:35,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571920843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:35,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:35,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 27 [2022-03-15 21:18:35,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [352150600] [2022-03-15 21:18:35,248 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:35,249 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:35,253 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 53 transitions. [2022-03-15 21:18:35,253 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:35,395 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1076978#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 1076976#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1076974#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1076979#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1076975#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1076977#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:18:35,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:18:35,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:18:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:18:35,396 INFO L87 Difference]: Start difference. First operand 3818 states and 10233 transitions. Second operand has 24 states, 24 states have (on average 1.875) 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 21:18:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:35,980 INFO L93 Difference]: Finished difference Result 4805 states and 12018 transitions. [2022-03-15 21:18:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 21:18:35,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) 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 25 [2022-03-15 21:18:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:35,988 INFO L225 Difference]: With dead ends: 4805 [2022-03-15 21:18:35,988 INFO L226 Difference]: Without dead ends: 4805 [2022-03-15 21:18:35,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1733, Invalid=4747, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:18:35,989 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 170 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:35,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4805 states. [2022-03-15 21:18:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4805 to 3728. [2022-03-15 21:18:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.671317413469278) internal successors, (9956), 3727 states have internal predecessors, (9956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 9956 transitions. [2022-03-15 21:18:36,038 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 9956 transitions. Word has length 25 [2022-03-15 21:18:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:36,038 INFO L470 AbstractCegarLoop]: Abstraction has 3728 states and 9956 transitions. [2022-03-15 21:18:36,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) 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 21:18:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 9956 transitions. [2022-03-15 21:18:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:36,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:36,042 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:36,058 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 21:18:36,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-03-15 21:18:36,257 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:36,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:36,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1893757, now seen corresponding path program 176 times [2022-03-15 21:18:36,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:36,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632386293] [2022-03-15 21:18:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:36,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:36,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:36,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632386293] [2022-03-15 21:18:36,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632386293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:36,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160522790] [2022-03-15 21:18:36,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:36,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:36,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:36,323 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 21:18:36,324 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 21:18:36,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:36,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:36,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:36,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:36,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:36,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160522790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:36,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:36,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 25 [2022-03-15 21:18:36,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1816750749] [2022-03-15 21:18:36,473 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:36,474 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:36,478 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 43 transitions. [2022-03-15 21:18:36,478 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:36,566 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1089506#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1089511#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 1089510#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 1089508#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1089507#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1089509#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 1089505#(< i2 (* 2 N))] [2022-03-15 21:18:36,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:18:36,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:18:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=739, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:18:36,567 INFO L87 Difference]: Start difference. First operand 3728 states and 9956 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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 21:18:36,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:36,729 INFO L93 Difference]: Finished difference Result 4558 states and 11658 transitions. [2022-03-15 21:18:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:18:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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 25 [2022-03-15 21:18:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:36,735 INFO L225 Difference]: With dead ends: 4558 [2022-03-15 21:18:36,735 INFO L226 Difference]: Without dead ends: 4551 [2022-03-15 21:18:36,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:18:36,736 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 137 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:36,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2022-03-15 21:18:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3912. [2022-03-15 21:18:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 2.6990539503963182) internal successors, (10556), 3911 states have internal predecessors, (10556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 10556 transitions. [2022-03-15 21:18:36,785 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 10556 transitions. Word has length 25 [2022-03-15 21:18:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:36,785 INFO L470 AbstractCegarLoop]: Abstraction has 3912 states and 10556 transitions. [2022-03-15 21:18:36,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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 21:18:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 10556 transitions. [2022-03-15 21:18:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:36,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:36,789 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:36,805 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 21:18:37,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-15 21:18:37,005 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash 240300071, now seen corresponding path program 177 times [2022-03-15 21:18:37,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:37,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042026097] [2022-03-15 21:18:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:37,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:37,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:37,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042026097] [2022-03-15 21:18:37,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042026097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:37,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599271431] [2022-03-15 21:18:37,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:37,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:37,058 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 21:18:37,060 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 21:18:37,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:18:37,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:37,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:18:37,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-15 21:18:37,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-15 21:18:37,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599271431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:37,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:37,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 4] total 28 [2022-03-15 21:18:37,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1312234824] [2022-03-15 21:18:37,286 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:37,287 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:37,291 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2022-03-15 21:18:37,291 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:37,390 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1102097#(< i2 (* 2 N)), 1102098#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1102101#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 1102102#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 1102100#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1102099#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N)))] [2022-03-15 21:18:37,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:18:37,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:37,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:18:37,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:18:37,391 INFO L87 Difference]: Start difference. First operand 3912 states and 10556 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:37,594 INFO L93 Difference]: Finished difference Result 4679 states and 11888 transitions. [2022-03-15 21:18:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:18:37,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:37,600 INFO L225 Difference]: With dead ends: 4679 [2022-03-15 21:18:37,600 INFO L226 Difference]: Without dead ends: 4673 [2022-03-15 21:18:37,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=503, Invalid=2047, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:18:37,601 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 110 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:37,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2022-03-15 21:18:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 3855. [2022-03-15 21:18:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3854 states have (on average 2.6886351842241827) internal successors, (10362), 3854 states have internal predecessors, (10362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 10362 transitions. [2022-03-15 21:18:37,673 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 10362 transitions. Word has length 25 [2022-03-15 21:18:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:37,673 INFO L470 AbstractCegarLoop]: Abstraction has 3855 states and 10362 transitions. [2022-03-15 21:18:37,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 10362 transitions. [2022-03-15 21:18:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:37,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:37,677 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:37,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-15 21:18:37,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:37,887 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 109565443, now seen corresponding path program 178 times [2022-03-15 21:18:37,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:37,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185108537] [2022-03-15 21:18:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:37,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:37,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:37,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185108537] [2022-03-15 21:18:37,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185108537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:37,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020525615] [2022-03-15 21:18:37,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:37,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:37,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:37,961 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 21:18:37,961 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 21:18:37,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:37,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:38,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:38,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020525615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:38,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:38,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 16] total 24 [2022-03-15 21:18:38,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1190352689] [2022-03-15 21:18:38,169 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:38,170 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:38,174 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 39 transitions. [2022-03-15 21:18:38,174 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:38,262 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1114694#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1114695#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1114696#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1114697#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 1114693#(< i2 (* 2 N))] [2022-03-15 21:18:38,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:18:38,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:38,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:18:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=583, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:18:38,263 INFO L87 Difference]: Start difference. First operand 3855 states and 10362 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:38,500 INFO L93 Difference]: Finished difference Result 4732 states and 11960 transitions. [2022-03-15 21:18:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:18:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:38,507 INFO L225 Difference]: With dead ends: 4732 [2022-03-15 21:18:38,507 INFO L226 Difference]: Without dead ends: 4727 [2022-03-15 21:18:38,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=713, Invalid=1449, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:18:38,507 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 153 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:38,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2022-03-15 21:18:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 3795. [2022-03-15 21:18:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 2.679493937796521) internal successors, (10166), 3794 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 10166 transitions. [2022-03-15 21:18:38,557 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 10166 transitions. Word has length 25 [2022-03-15 21:18:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:38,557 INFO L470 AbstractCegarLoop]: Abstraction has 3795 states and 10166 transitions. [2022-03-15 21:18:38,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 10166 transitions. [2022-03-15 21:18:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:38,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:38,561 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:38,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:38,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:38,771 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:38,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1972861785, now seen corresponding path program 179 times [2022-03-15 21:18:38,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:38,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102011587] [2022-03-15 21:18:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:38,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:38,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102011587] [2022-03-15 21:18:38,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102011587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:38,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399975999] [2022-03-15 21:18:38,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:38,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:38,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:38,818 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 21:18:38,818 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 21:18:38,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:18:38,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:38,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:38,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399975999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:38,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:38,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 17] total 25 [2022-03-15 21:18:38,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1691705815] [2022-03-15 21:18:38,983 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:38,984 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:38,987 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2022-03-15 21:18:38,987 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:39,030 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1127225#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1127226#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1127227#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1127224#(< i2 (* 2 N))] [2022-03-15 21:18:39,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:18:39,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:18:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:18:39,032 INFO L87 Difference]: Start difference. First operand 3795 states and 10166 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:39,185 INFO L93 Difference]: Finished difference Result 4706 states and 11841 transitions. [2022-03-15 21:18:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:18:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:39,191 INFO L225 Difference]: With dead ends: 4706 [2022-03-15 21:18:39,191 INFO L226 Difference]: Without dead ends: 4702 [2022-03-15 21:18:39,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=762, Invalid=1494, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:18:39,191 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 135 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:39,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2022-03-15 21:18:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 3795. [2022-03-15 21:18:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 2.6779124934106484) internal successors, (10160), 3794 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 10160 transitions. [2022-03-15 21:18:39,244 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 10160 transitions. Word has length 25 [2022-03-15 21:18:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:39,244 INFO L470 AbstractCegarLoop]: Abstraction has 3795 states and 10160 transitions. [2022-03-15 21:18:39,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 10160 transitions. [2022-03-15 21:18:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:39,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:39,248 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:39,264 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 21:18:39,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:39,459 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2116383107, now seen corresponding path program 180 times [2022-03-15 21:18:39,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:39,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989436428] [2022-03-15 21:18:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:39,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:39,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989436428] [2022-03-15 21:18:39,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989436428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:39,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049510397] [2022-03-15 21:18:39,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:39,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:39,502 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 21:18:39,503 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 21:18:39,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:18:39,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:39,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:39,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049510397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:39,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:39,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15] total 23 [2022-03-15 21:18:39,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898997279] [2022-03-15 21:18:39,663 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:39,664 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:39,667 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2022-03-15 21:18:39,668 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:39,699 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1139728#(< i2 (* 2 N)), 1139729#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1139730#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N)))] [2022-03-15 21:18:39,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:18:39,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:18:39,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=444, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:39,699 INFO L87 Difference]: Start difference. First operand 3795 states and 10160 transitions. Second operand has 16 states, 16 states have (on average 2.0) 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 21:18:39,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:39,871 INFO L93 Difference]: Finished difference Result 4682 states and 11789 transitions. [2022-03-15 21:18:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:18:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) 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 25 [2022-03-15 21:18:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:39,877 INFO L225 Difference]: With dead ends: 4682 [2022-03-15 21:18:39,877 INFO L226 Difference]: Without dead ends: 4679 [2022-03-15 21:18:39,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=703, Invalid=1367, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:18:39,885 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 81 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:39,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-03-15 21:18:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3795. [2022-03-15 21:18:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 2.677121771217712) internal successors, (10157), 3794 states have internal predecessors, (10157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 10157 transitions. [2022-03-15 21:18:39,940 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 10157 transitions. Word has length 25 [2022-03-15 21:18:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:39,940 INFO L470 AbstractCegarLoop]: Abstraction has 3795 states and 10157 transitions. [2022-03-15 21:18:39,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) 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 21:18:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 10157 transitions. [2022-03-15 21:18:39,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:39,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:39,944 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:39,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-15 21:18:40,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:40,160 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash 585726247, now seen corresponding path program 181 times [2022-03-15 21:18:40,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:40,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938105142] [2022-03-15 21:18:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:40,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:40,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938105142] [2022-03-15 21:18:40,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938105142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:40,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285768616] [2022-03-15 21:18:40,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:40,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:40,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:40,220 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 21:18:40,220 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 21:18:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:40,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:40,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:40,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285768616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:40,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:40,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 16] total 24 [2022-03-15 21:18:40,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [889657088] [2022-03-15 21:18:40,447 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:40,448 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:40,452 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:40,452 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:40,472 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1152210#(< i2 (* 2 N)), 1152211#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:18:40,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:40,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=426, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:40,473 INFO L87 Difference]: Start difference. First operand 3795 states and 10157 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:40,625 INFO L93 Difference]: Finished difference Result 4733 states and 11951 transitions. [2022-03-15 21:18:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:18:40,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:40,631 INFO L225 Difference]: With dead ends: 4733 [2022-03-15 21:18:40,631 INFO L226 Difference]: Without dead ends: 4731 [2022-03-15 21:18:40,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=752, Invalid=1410, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:18:40,631 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 85 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:40,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2022-03-15 21:18:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 3864. [2022-03-15 21:18:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3863 states have (on average 2.68366554491328) internal successors, (10367), 3863 states have internal predecessors, (10367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 10367 transitions. [2022-03-15 21:18:40,678 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 10367 transitions. Word has length 25 [2022-03-15 21:18:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:40,678 INFO L470 AbstractCegarLoop]: Abstraction has 3864 states and 10367 transitions. [2022-03-15 21:18:40,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 10367 transitions. [2022-03-15 21:18:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:40,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:40,682 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:40,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:40,895 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,SelfDestructingSolverStorable183 [2022-03-15 21:18:40,895 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:40,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1862273693, now seen corresponding path program 182 times [2022-03-15 21:18:40,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:40,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692428086] [2022-03-15 21:18:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:40,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 46 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:40,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:40,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692428086] [2022-03-15 21:18:40,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692428086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:40,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040631301] [2022-03-15 21:18:40,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:40,999 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:40,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-15 21:18:41,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:41,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:41,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:18:41,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:18:41,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:18:41,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040631301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:41,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:41,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 26 [2022-03-15 21:18:41,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [378083913] [2022-03-15 21:18:41,195 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:41,196 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:41,201 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 65 transitions. [2022-03-15 21:18:41,201 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:41,595 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 18 new interpolants: [1164896#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 1164897#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1164888#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1164887#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1164894#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1164900#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1164884#(< i2 (* 2 N)), 1164886#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1164899#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 1164892#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1164893#(< i1 (* 2 N)), 1164898#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 1164885#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1164891#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 1164901#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 1164890#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1164895#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1164889#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:18:41,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:18:41,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:18:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1566, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:18:41,596 INFO L87 Difference]: Start difference. First operand 3864 states and 10367 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:44,388 INFO L93 Difference]: Finished difference Result 6333 states and 15164 transitions. [2022-03-15 21:18:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-15 21:18:44,389 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:44,396 INFO L225 Difference]: With dead ends: 6333 [2022-03-15 21:18:44,396 INFO L226 Difference]: Without dead ends: 5969 [2022-03-15 21:18:44,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10527 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4770, Invalid=24986, Unknown=0, NotChecked=0, Total=29756 [2022-03-15 21:18:44,399 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 455 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:44,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 1 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:18:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2022-03-15 21:18:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 3320. [2022-03-15 21:18:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3319 states have (on average 2.5923470924977403) internal successors, (8604), 3319 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 8604 transitions. [2022-03-15 21:18:44,447 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 8604 transitions. Word has length 25 [2022-03-15 21:18:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:44,447 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 8604 transitions. [2022-03-15 21:18:44,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 8604 transitions. [2022-03-15 21:18:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:44,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:44,451 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:44,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-15 21:18:44,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:44,659 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash 259255555, now seen corresponding path program 183 times [2022-03-15 21:18:44,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:44,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069066766] [2022-03-15 21:18:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:44,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:44,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:44,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069066766] [2022-03-15 21:18:44,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069066766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:44,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684908496] [2022-03-15 21:18:44,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:44,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:44,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:44,720 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:44,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-15 21:18:44,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:18:44,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:44,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:44,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:44,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684908496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:44,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:44,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 24 [2022-03-15 21:18:44,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [712573481] [2022-03-15 21:18:44,896 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:44,898 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:44,903 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2022-03-15 21:18:44,903 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:44,912 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1178300#(< i2 (* 2 N))] [2022-03-15 21:18:44,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:18:44,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:18:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:18:44,912 INFO L87 Difference]: Start difference. First operand 3320 states and 8604 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:45,107 INFO L93 Difference]: Finished difference Result 4409 states and 10698 transitions. [2022-03-15 21:18:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:18:45,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:45,113 INFO L225 Difference]: With dead ends: 4409 [2022-03-15 21:18:45,113 INFO L226 Difference]: Without dead ends: 4407 [2022-03-15 21:18:45,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=783, Invalid=1473, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:18:45,113 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 80 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:45,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2022-03-15 21:18:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3317. [2022-03-15 21:18:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 2.5904704463208685) internal successors, (8590), 3316 states have internal predecessors, (8590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:45,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 8590 transitions. [2022-03-15 21:18:45,152 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 8590 transitions. Word has length 25 [2022-03-15 21:18:45,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:45,152 INFO L470 AbstractCegarLoop]: Abstraction has 3317 states and 8590 transitions. [2022-03-15 21:18:45,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 8590 transitions. [2022-03-15 21:18:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:45,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:45,155 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:45,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-15 21:18:45,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:45,372 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash -239445785, now seen corresponding path program 184 times [2022-03-15 21:18:45,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:45,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423347431] [2022-03-15 21:18:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:45,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:45,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:45,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423347431] [2022-03-15 21:18:45,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423347431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:45,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665420392] [2022-03-15 21:18:45,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:45,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:45,416 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:45,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-15 21:18:45,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:45,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:45,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:45,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:45,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665420392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:45,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:45,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:18:45,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2044950661] [2022-03-15 21:18:45,621 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:45,622 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:45,626 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2022-03-15 21:18:45,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:45,657 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1189558#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:45,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:18:45,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:18:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:18:45,658 INFO L87 Difference]: Start difference. First operand 3317 states and 8590 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:45,822 INFO L93 Difference]: Finished difference Result 4621 states and 11046 transitions. [2022-03-15 21:18:45,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:18:45,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:45,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:45,828 INFO L225 Difference]: With dead ends: 4621 [2022-03-15 21:18:45,828 INFO L226 Difference]: Without dead ends: 4621 [2022-03-15 21:18:45,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=667, Invalid=1313, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:18:45,828 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 96 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:45,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4621 states. [2022-03-15 21:18:45,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4621 to 3318. [2022-03-15 21:18:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3318 states, 3317 states have (on average 2.590593910159783) internal successors, (8593), 3317 states have internal predecessors, (8593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 8593 transitions. [2022-03-15 21:18:45,868 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 8593 transitions. Word has length 25 [2022-03-15 21:18:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:45,868 INFO L470 AbstractCegarLoop]: Abstraction has 3318 states and 8593 transitions. [2022-03-15 21:18:45,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 8593 transitions. [2022-03-15 21:18:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:45,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:45,871 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:45,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:46,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:46,087 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:46,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:46,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1094752439, now seen corresponding path program 185 times [2022-03-15 21:18:46,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:46,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307595483] [2022-03-15 21:18:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:46,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:46,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:46,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307595483] [2022-03-15 21:18:46,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307595483] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:46,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208977789] [2022-03-15 21:18:46,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:46,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:46,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:46,134 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:46,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-15 21:18:46,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:18:46,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:46,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:46,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208977789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:46,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:46,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 17] total 26 [2022-03-15 21:18:46,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1329210909] [2022-03-15 21:18:46,322 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:46,323 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:46,327 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2022-03-15 21:18:46,327 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:46,377 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1201024#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1201023#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:18:46,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:18:46,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:18:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:18:46,377 INFO L87 Difference]: Start difference. First operand 3318 states and 8593 transitions. Second operand has 16 states, 16 states have (on average 2.0625) 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 21:18:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:46,593 INFO L93 Difference]: Finished difference Result 4744 states and 11268 transitions. [2022-03-15 21:18:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:18:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) 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 25 [2022-03-15 21:18:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:46,599 INFO L225 Difference]: With dead ends: 4744 [2022-03-15 21:18:46,600 INFO L226 Difference]: Without dead ends: 4744 [2022-03-15 21:18:46,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=883, Invalid=1979, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:18:46,600 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 147 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:46,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2022-03-15 21:18:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 3320. [2022-03-15 21:18:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3319 states have (on average 2.5908406146429646) internal successors, (8599), 3319 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 8599 transitions. [2022-03-15 21:18:46,647 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 8599 transitions. Word has length 25 [2022-03-15 21:18:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:46,647 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 8599 transitions. [2022-03-15 21:18:46,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) 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 21:18:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 8599 transitions. [2022-03-15 21:18:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:46,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:46,650 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:46,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:46,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:46,867 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:46,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1839454937, now seen corresponding path program 186 times [2022-03-15 21:18:46,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:46,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024416531] [2022-03-15 21:18:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:46,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:46,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024416531] [2022-03-15 21:18:46,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024416531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:46,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271517717] [2022-03-15 21:18:46,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:46,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:46,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:46,921 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:46,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-15 21:18:46,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:18:46,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:46,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:47,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271517717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:47,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:47,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 26 [2022-03-15 21:18:47,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [807279667] [2022-03-15 21:18:47,118 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:47,119 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:47,123 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2022-03-15 21:18:47,123 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:47,192 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1212630#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1212631#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1212632#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:18:47,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:18:47,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:18:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:18:47,192 INFO L87 Difference]: Start difference. First operand 3320 states and 8599 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:47,514 INFO L93 Difference]: Finished difference Result 4748 states and 11239 transitions. [2022-03-15 21:18:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:18:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 25 [2022-03-15 21:18:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:47,520 INFO L225 Difference]: With dead ends: 4748 [2022-03-15 21:18:47,520 INFO L226 Difference]: Without dead ends: 4748 [2022-03-15 21:18:47,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1166, Invalid=2994, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:18:47,521 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 160 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:47,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2022-03-15 21:18:47,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3322. [2022-03-15 21:18:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3321 states have (on average 2.591087021981331) internal successors, (8605), 3321 states have internal predecessors, (8605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 8605 transitions. [2022-03-15 21:18:47,566 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 8605 transitions. Word has length 25 [2022-03-15 21:18:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:47,566 INFO L470 AbstractCegarLoop]: Abstraction has 3322 states and 8605 transitions. [2022-03-15 21:18:47,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:18:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 8605 transitions. [2022-03-15 21:18:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:47,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:47,569 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:47,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:47,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:47,785 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash 844571401, now seen corresponding path program 187 times [2022-03-15 21:18:47,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:47,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206392223] [2022-03-15 21:18:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:47,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:47,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206392223] [2022-03-15 21:18:47,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206392223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:47,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179310093] [2022-03-15 21:18:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:47,840 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:47,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-15 21:18:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:47,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:47,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:48,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179310093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:48,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:48,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-03-15 21:18:48,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1015034151] [2022-03-15 21:18:48,058 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:48,059 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:48,063 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 45 transitions. [2022-03-15 21:18:48,064 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:48,178 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1224267#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1224268#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1224269#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1224270#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:18:48,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:18:48,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:48,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:18:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=704, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:18:48,178 INFO L87 Difference]: Start difference. First operand 3322 states and 8605 transitions. Second operand has 20 states, 20 states have (on average 1.95) 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 21:18:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:48,627 INFO L93 Difference]: Finished difference Result 4605 states and 10933 transitions. [2022-03-15 21:18:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:18:48,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) 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 25 [2022-03-15 21:18:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:48,633 INFO L225 Difference]: With dead ends: 4605 [2022-03-15 21:18:48,633 INFO L226 Difference]: Without dead ends: 4605 [2022-03-15 21:18:48,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1278, Invalid=3278, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:18:48,634 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 164 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:48,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2022-03-15 21:18:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 3324. [2022-03-15 21:18:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 2.5913331327114055) internal successors, (8611), 3323 states have internal predecessors, (8611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 8611 transitions. [2022-03-15 21:18:48,673 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 8611 transitions. Word has length 25 [2022-03-15 21:18:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:48,673 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 8611 transitions. [2022-03-15 21:18:48,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) 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 21:18:48,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 8611 transitions. [2022-03-15 21:18:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:48,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:48,676 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:48,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:48,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-15 21:18:48,893 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1849958041, now seen corresponding path program 188 times [2022-03-15 21:18:48,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:48,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507987499] [2022-03-15 21:18:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:48,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:48,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:48,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507987499] [2022-03-15 21:18:48,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507987499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:48,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611138737] [2022-03-15 21:18:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:48,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:48,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:48,971 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:48,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-15 21:18:48,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:48,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:48,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:48,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:49,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:49,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611138737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:49,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:49,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2022-03-15 21:18:49,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1495278091] [2022-03-15 21:18:49,225 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:49,227 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:49,231 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 49 transitions. [2022-03-15 21:18:49,231 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:49,425 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1235769#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1235771#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 1235772#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 1235768#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1235770#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:18:49,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:18:49,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:18:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:18:49,426 INFO L87 Difference]: Start difference. First operand 3324 states and 8611 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) 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 21:18:50,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:50,159 INFO L93 Difference]: Finished difference Result 4386 states and 10494 transitions. [2022-03-15 21:18:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 21:18:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) 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 25 [2022-03-15 21:18:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:50,165 INFO L225 Difference]: With dead ends: 4386 [2022-03-15 21:18:50,165 INFO L226 Difference]: Without dead ends: 4386 [2022-03-15 21:18:50,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1715, Invalid=4765, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:18:50,166 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 166 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:50,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:18:50,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2022-03-15 21:18:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3278. [2022-03-15 21:18:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.6014647543484894) internal successors, (8525), 3277 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 8525 transitions. [2022-03-15 21:18:50,204 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 8525 transitions. Word has length 25 [2022-03-15 21:18:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:50,204 INFO L470 AbstractCegarLoop]: Abstraction has 3278 states and 8525 transitions. [2022-03-15 21:18:50,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) 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 21:18:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 8525 transitions. [2022-03-15 21:18:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:50,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:50,207 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:50,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:50,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-15 21:18:50,425 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash 518975177, now seen corresponding path program 189 times [2022-03-15 21:18:50,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:50,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625313151] [2022-03-15 21:18:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:50,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:50,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:50,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625313151] [2022-03-15 21:18:50,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625313151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:50,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27817924] [2022-03-15 21:18:50,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:50,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:50,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:50,539 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:50,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-15 21:18:50,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:18:50,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:50,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:50,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:18:50,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:50,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27817924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:50,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:50,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19] total 28 [2022-03-15 21:18:50,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1186819274] [2022-03-15 21:18:50,803 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:50,804 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:50,809 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 53 transitions. [2022-03-15 21:18:50,809 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:51,016 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1246988#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 1246989#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1246986#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1246985#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1246984#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1246987#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:18:51,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:18:51,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:18:51,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:18:51,019 INFO L87 Difference]: Start difference. First operand 3278 states and 8525 transitions. Second operand has 24 states, 24 states have (on average 1.875) 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 21:18:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:51,706 INFO L93 Difference]: Finished difference Result 3899 states and 9541 transitions. [2022-03-15 21:18:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:18:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) 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 25 [2022-03-15 21:18:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:51,711 INFO L225 Difference]: With dead ends: 3899 [2022-03-15 21:18:51,711 INFO L226 Difference]: Without dead ends: 3899 [2022-03-15 21:18:51,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1622, Invalid=4540, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:18:51,712 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 148 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:51,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:18:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2022-03-15 21:18:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3229. [2022-03-15 21:18:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3228 states have (on average 2.5932465923172243) internal successors, (8371), 3228 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 8371 transitions. [2022-03-15 21:18:51,752 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 8371 transitions. Word has length 25 [2022-03-15 21:18:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:51,752 INFO L470 AbstractCegarLoop]: Abstraction has 3229 states and 8371 transitions. [2022-03-15 21:18:51,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) 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 21:18:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 8371 transitions. [2022-03-15 21:18:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:51,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:51,755 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:51,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:51,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:51,971 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash 941460903, now seen corresponding path program 190 times [2022-03-15 21:18:51,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:51,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7776488] [2022-03-15 21:18:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:52,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:52,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7776488] [2022-03-15 21:18:52,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7776488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:52,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274704290] [2022-03-15 21:18:52,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:52,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:52,086 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:52,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-15 21:18:52,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:52,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:52,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:52,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274704290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:52,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:52,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19] total 28 [2022-03-15 21:18:52,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1215890670] [2022-03-15 21:18:52,315 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:52,316 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:52,321 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 57 transitions. [2022-03-15 21:18:52,321 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:52,520 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1257610#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1257609#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1257613#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1257608#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1257614#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 1257611#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 1257612#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:18:52,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:18:52,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:52,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:18:52,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:18:52,521 INFO L87 Difference]: Start difference. First operand 3229 states and 8371 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) 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 21:18:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:53,528 INFO L93 Difference]: Finished difference Result 4046 states and 9903 transitions. [2022-03-15 21:18:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 21:18:53,529 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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 21:18:53,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:53,534 INFO L225 Difference]: With dead ends: 4046 [2022-03-15 21:18:53,534 INFO L226 Difference]: Without dead ends: 4046 [2022-03-15 21:18:53,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2539, Invalid=7163, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 21:18:53,535 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 159 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:53,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:18:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2022-03-15 21:18:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3245. [2022-03-15 21:18:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3244 states have (on average 2.5952527743526512) internal successors, (8419), 3244 states have internal predecessors, (8419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 8419 transitions. [2022-03-15 21:18:53,574 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 8419 transitions. Word has length 25 [2022-03-15 21:18:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:53,574 INFO L470 AbstractCegarLoop]: Abstraction has 3245 states and 8419 transitions. [2022-03-15 21:18:53,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) 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 21:18:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 8419 transitions. [2022-03-15 21:18:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:53,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:53,577 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:53,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:53,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:53,789 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash -965527927, now seen corresponding path program 191 times [2022-03-15 21:18:53,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:53,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335430806] [2022-03-15 21:18:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:53,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:53,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:53,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335430806] [2022-03-15 21:18:53,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335430806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:53,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388415251] [2022-03-15 21:18:53,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:53,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:53,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:53,908 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:53,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-15 21:18:53,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:18:53,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:53,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:53,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:54,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388415251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:54,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:54,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19] total 28 [2022-03-15 21:18:54,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [116364438] [2022-03-15 21:18:54,137 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:54,138 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:54,142 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:18:54,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:54,317 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [1268453#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1268457#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 1268456#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 1268451#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1268452#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1268454#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 1268450#(< i2 (* 2 N)), 1268455#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4)))] [2022-03-15 21:18:54,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:18:54,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:54,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:18:54,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:18:54,317 INFO L87 Difference]: Start difference. First operand 3245 states and 8419 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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 21:18:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:54,595 INFO L93 Difference]: Finished difference Result 3794 states and 9275 transitions. [2022-03-15 21:18:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:18:54,595 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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 25 [2022-03-15 21:18:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:54,600 INFO L225 Difference]: With dead ends: 3794 [2022-03-15 21:18:54,600 INFO L226 Difference]: Without dead ends: 3786 [2022-03-15 21:18:54,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=892, Invalid=1970, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:18:54,601 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 133 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:54,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2022-03-15 21:18:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3195. [2022-03-15 21:18:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 2.582968065122104) internal successors, (8250), 3194 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 8250 transitions. [2022-03-15 21:18:54,640 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 8250 transitions. Word has length 25 [2022-03-15 21:18:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:54,640 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 8250 transitions. [2022-03-15 21:18:54,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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 21:18:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 8250 transitions. [2022-03-15 21:18:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:54,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:54,643 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:54,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:54,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:54,859 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1627338307, now seen corresponding path program 192 times [2022-03-15 21:18:54,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:54,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696358245] [2022-03-15 21:18:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:54,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:54,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696358245] [2022-03-15 21:18:54,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696358245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:54,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175148064] [2022-03-15 21:18:54,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:18:54,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:54,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:54,969 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:54,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-15 21:18:54,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:18:54,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:54,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:54,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:55,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:55,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175148064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:55,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:55,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 27 [2022-03-15 21:18:55,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1970357313] [2022-03-15 21:18:55,213 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:55,214 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:55,218 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:18:55,218 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:55,344 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1278852#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 1278854#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 1278851#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1278853#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 1278848#(< i2 (* 2 N)), 1278850#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1278849#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:18:55,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:18:55,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:18:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=821, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:18:55,345 INFO L87 Difference]: Start difference. First operand 3195 states and 8250 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:55,591 INFO L93 Difference]: Finished difference Result 3927 states and 9544 transitions. [2022-03-15 21:18:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:18:55,591 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:55,596 INFO L225 Difference]: With dead ends: 3927 [2022-03-15 21:18:55,596 INFO L226 Difference]: Without dead ends: 3920 [2022-03-15 21:18:55,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=884, Invalid=1872, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:18:55,596 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 176 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:55,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 1 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:55,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2022-03-15 21:18:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3144. [2022-03-15 21:18:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 2.570792236716513) internal successors, (8080), 3143 states have internal predecessors, (8080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 8080 transitions. [2022-03-15 21:18:55,634 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 8080 transitions. Word has length 25 [2022-03-15 21:18:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:55,634 INFO L470 AbstractCegarLoop]: Abstraction has 3144 states and 8080 transitions. [2022-03-15 21:18:55,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 8080 transitions. [2022-03-15 21:18:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:55,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:55,637 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:55,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:55,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:55,853 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:55,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1433884489, now seen corresponding path program 193 times [2022-03-15 21:18:55,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:55,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953900059] [2022-03-15 21:18:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:55,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:55,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:55,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953900059] [2022-03-15 21:18:55,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953900059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:55,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690314293] [2022-03-15 21:18:55,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:18:55,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:55,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:55,933 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:55,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-15 21:18:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:55,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:56,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:56,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690314293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:56,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:56,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2022-03-15 21:18:56,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1181351683] [2022-03-15 21:18:56,138 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:56,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:56,144 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:18:56,144 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:56,254 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1289283#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 1289279#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1289281#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1289282#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 1289280#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1289278#(< i2 (* 2 N))] [2022-03-15 21:18:56,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:18:56,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:18:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=757, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:18:56,254 INFO L87 Difference]: Start difference. First operand 3144 states and 8080 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:56,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:56,489 INFO L93 Difference]: Finished difference Result 4009 states and 9696 transitions. [2022-03-15 21:18:56,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:18:56,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 21:18:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:56,495 INFO L225 Difference]: With dead ends: 4009 [2022-03-15 21:18:56,495 INFO L226 Difference]: Without dead ends: 4003 [2022-03-15 21:18:56,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=901, Invalid=1855, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:18:56,495 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 159 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:56,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2022-03-15 21:18:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3091. [2022-03-15 21:18:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3090 states have (on average 2.559223300970874) internal successors, (7908), 3090 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 7908 transitions. [2022-03-15 21:18:56,531 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 7908 transitions. Word has length 25 [2022-03-15 21:18:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:56,531 INFO L470 AbstractCegarLoop]: Abstraction has 3091 states and 7908 transitions. [2022-03-15 21:18:56,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 7908 transitions. [2022-03-15 21:18:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:56,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:56,534 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:56,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-15 21:18:56,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:56,747 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1150549379, now seen corresponding path program 194 times [2022-03-15 21:18:56,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:56,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637842528] [2022-03-15 21:18:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:56,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:56,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:56,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637842528] [2022-03-15 21:18:56,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637842528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:56,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076109520] [2022-03-15 21:18:56,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:18:56,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:56,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:56,828 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:56,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-15 21:18:56,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:18:56,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:56,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:57,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076109520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:57,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:57,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17] total 26 [2022-03-15 21:18:57,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [119094920] [2022-03-15 21:18:57,047 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:57,048 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:57,052 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:18:57,052 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:57,143 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1299685#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1299686#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1299684#(< i2 (* 2 N)), 1299687#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1299688#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:18:57,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:18:57,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:18:57,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=655, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:18:57,143 INFO L87 Difference]: Start difference. First operand 3091 states and 7908 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) 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 21:18:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:57,364 INFO L93 Difference]: Finished difference Result 4023 states and 9688 transitions. [2022-03-15 21:18:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:18:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) 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 25 [2022-03-15 21:18:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:57,369 INFO L225 Difference]: With dead ends: 4023 [2022-03-15 21:18:57,369 INFO L226 Difference]: Without dead ends: 4018 [2022-03-15 21:18:57,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=881, Invalid=1771, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:18:57,371 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 141 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:57,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2022-03-15 21:18:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3037. [2022-03-15 21:18:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3037 states, 3036 states have (on average 2.547760210803689) internal successors, (7735), 3036 states have internal predecessors, (7735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3037 states to 3037 states and 7735 transitions. [2022-03-15 21:18:57,449 INFO L78 Accepts]: Start accepts. Automaton has 3037 states and 7735 transitions. Word has length 25 [2022-03-15 21:18:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:57,449 INFO L470 AbstractCegarLoop]: Abstraction has 3037 states and 7735 transitions. [2022-03-15 21:18:57,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) 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 21:18:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3037 states and 7735 transitions. [2022-03-15 21:18:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:57,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:57,452 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:57,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-15 21:18:57,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:57,668 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1418504201, now seen corresponding path program 195 times [2022-03-15 21:18:57,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:57,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988540890] [2022-03-15 21:18:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:57,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:57,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:57,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988540890] [2022-03-15 21:18:57,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988540890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:57,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404789562] [2022-03-15 21:18:57,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:18:57,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:57,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:57,746 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:57,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-15 21:18:57,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:18:57,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:57,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:18:57,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-15 21:18:57,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-15 21:18:58,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404789562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:58,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:58,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 4] total 27 [2022-03-15 21:18:58,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1475523021] [2022-03-15 21:18:58,061 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:58,062 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:58,067 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:18:58,067 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:58,192 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1309998#(< i2 (* 2 N)), 1310000#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1309999#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1310001#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1)))] [2022-03-15 21:18:58,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:18:58,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:18:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:18:58,193 INFO L87 Difference]: Start difference. First operand 3037 states and 7735 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 21:18:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:58,557 INFO L93 Difference]: Finished difference Result 3962 states and 9510 transitions. [2022-03-15 21:18:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:18:58,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 25 [2022-03-15 21:18:58,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:58,562 INFO L225 Difference]: With dead ends: 3962 [2022-03-15 21:18:58,562 INFO L226 Difference]: Without dead ends: 3958 [2022-03-15 21:18:58,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=2195, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:18:58,563 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 144 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:58,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2022-03-15 21:18:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2981. [2022-03-15 21:18:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 2.5369127516778525) internal successors, (7560), 2980 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7560 transitions. [2022-03-15 21:18:58,597 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7560 transitions. Word has length 25 [2022-03-15 21:18:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:58,598 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 7560 transitions. [2022-03-15 21:18:58,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 21:18:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7560 transitions. [2022-03-15 21:18:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:58,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:58,600 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:58,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-15 21:18:58,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:58,816 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -651062077, now seen corresponding path program 196 times [2022-03-15 21:18:58,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:58,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642444508] [2022-03-15 21:18:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:58,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:58,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:58,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642444508] [2022-03-15 21:18:58,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642444508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:58,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502237664] [2022-03-15 21:18:58,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:18:58,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:58,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:58,891 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:58,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-15 21:18:58,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:18:58,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:58,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:58,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:18:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:59,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502237664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:18:59,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:18:59,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 25 [2022-03-15 21:18:59,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [321600597] [2022-03-15 21:18:59,142 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:18:59,144 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:18:59,148 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:18:59,148 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:18:59,228 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1320140#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1320139#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1320138#(< i2 (* 2 N))] [2022-03-15 21:18:59,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:18:59,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:18:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:18:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=506, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:18:59,228 INFO L87 Difference]: Start difference. First operand 2981 states and 7560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 21:18:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:18:59,491 INFO L93 Difference]: Finished difference Result 3837 states and 9180 transitions. [2022-03-15 21:18:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:18:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 25 [2022-03-15 21:18:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:18:59,496 INFO L225 Difference]: With dead ends: 3837 [2022-03-15 21:18:59,497 INFO L226 Difference]: Without dead ends: 3834 [2022-03-15 21:18:59,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=861, Invalid=1689, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:18:59,497 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 137 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:18:59,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:18:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2022-03-15 21:18:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 2980. [2022-03-15 21:18:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 2.536085934877476) internal successors, (7555), 2979 states have internal predecessors, (7555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:18:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 7555 transitions. [2022-03-15 21:18:59,537 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 7555 transitions. Word has length 25 [2022-03-15 21:18:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:18:59,537 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 7555 transitions. [2022-03-15 21:18:59,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 21:18:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 7555 transitions. [2022-03-15 21:18:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:18:59,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:18:59,540 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:18:59,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-15 21:18:59,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:59,743 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:18:59,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:18:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash -163632951, now seen corresponding path program 197 times [2022-03-15 21:18:59,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:18:59,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749485130] [2022-03-15 21:18:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:18:59,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:18:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:18:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:59,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:18:59,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749485130] [2022-03-15 21:18:59,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749485130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:18:59,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923311379] [2022-03-15 21:18:59,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:18:59,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:18:59,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:18:59,802 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:18:59,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-15 21:18:59,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:18:59,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:18:59,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:18:59,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:18:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:18:59,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:00,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923311379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:00,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:00,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:19:00,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [282638648] [2022-03-15 21:19:00,017 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:00,018 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:00,023 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:19:00,023 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:00,080 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1330153#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1330152#(< i2 (* 2 N))] [2022-03-15 21:19:00,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:19:00,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:00,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:19:00,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=454, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:19:00,080 INFO L87 Difference]: Start difference. First operand 2980 states and 7555 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 21:19:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:00,349 INFO L93 Difference]: Finished difference Result 3713 states and 8918 transitions. [2022-03-15 21:19:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:19:00,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 25 [2022-03-15 21:19:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:00,353 INFO L225 Difference]: With dead ends: 3713 [2022-03-15 21:19:00,353 INFO L226 Difference]: Without dead ends: 3711 [2022-03-15 21:19:00,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=866, Invalid=1684, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:19:00,353 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:00,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2022-03-15 21:19:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2980. [2022-03-15 21:19:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 2.535414568647197) internal successors, (7553), 2979 states have internal predecessors, (7553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 7553 transitions. [2022-03-15 21:19:00,387 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 7553 transitions. Word has length 25 [2022-03-15 21:19:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:00,387 INFO L470 AbstractCegarLoop]: Abstraction has 2980 states and 7553 transitions. [2022-03-15 21:19:00,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 21:19:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 7553 transitions. [2022-03-15 21:19:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:00,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:00,390 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:00,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:00,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-15 21:19:00,604 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1683334405, now seen corresponding path program 198 times [2022-03-15 21:19:00,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:00,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563281662] [2022-03-15 21:19:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:00,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:00,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563281662] [2022-03-15 21:19:00,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563281662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:00,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561956215] [2022-03-15 21:19:00,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:19:00,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:00,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:00,689 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:00,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-15 21:19:00,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:19:00,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 46 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:00,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:00,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561956215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:00,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:00,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 19] total 29 [2022-03-15 21:19:00,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [882920263] [2022-03-15 21:19:00,892 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:00,893 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:00,900 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 85 transitions. [2022-03-15 21:19:00,900 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:01,234 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [1340000#(<= (* 2 N) (+ 7 i2)), 1340058#(< i1 (* 2 N)), 1340048#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1340053#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1340050#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1340051#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1340065#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1340059#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1340057#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 1340064#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 1340052#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1340056#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 1340047#(< i2 (* 2 N)), 1340055#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1340063#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 1340054#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 1340049#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1340061#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 1340060#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1340062#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:19:01,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 21:19:01,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 21:19:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:19:01,235 INFO L87 Difference]: Start difference. First operand 2980 states and 7553 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:04,356 INFO L93 Difference]: Finished difference Result 4605 states and 10809 transitions. [2022-03-15 21:19:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-15 21:19:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 21:19:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:04,362 INFO L225 Difference]: With dead ends: 4605 [2022-03-15 21:19:04,362 INFO L226 Difference]: Without dead ends: 4444 [2022-03-15 21:19:04,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12660 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6013, Invalid=30659, Unknown=0, NotChecked=0, Total=36672 [2022-03-15 21:19:04,366 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 505 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:04,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 1 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:19:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2022-03-15 21:19:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 2773. [2022-03-15 21:19:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 2.5674603174603177) internal successors, (7117), 2772 states have internal predecessors, (7117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 7117 transitions. [2022-03-15 21:19:04,402 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 7117 transitions. Word has length 25 [2022-03-15 21:19:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:04,402 INFO L470 AbstractCegarLoop]: Abstraction has 2773 states and 7117 transitions. [2022-03-15 21:19:04,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 7117 transitions. [2022-03-15 21:19:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:04,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:04,405 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:04,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:04,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-15 21:19:04,622 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1791753219, now seen corresponding path program 199 times [2022-03-15 21:19:04,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:04,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347974307] [2022-03-15 21:19:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:04,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:04,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:04,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347974307] [2022-03-15 21:19:04,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347974307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:04,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698939980] [2022-03-15 21:19:04,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:19:04,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:04,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:04,702 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:04,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-15 21:19:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:04,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:04,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:04,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698939980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:04,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:04,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 24 [2022-03-15 21:19:04,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [257090058] [2022-03-15 21:19:04,976 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:04,977 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:04,982 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:19:04,982 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:05,038 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1350672#(< i2 (* 2 N))] [2022-03-15 21:19:05,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:19:05,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:19:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=374, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:19:05,039 INFO L87 Difference]: Start difference. First operand 2773 states and 7117 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 21:19:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:05,316 INFO L93 Difference]: Finished difference Result 3388 states and 8347 transitions. [2022-03-15 21:19:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:19:05,317 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 25 [2022-03-15 21:19:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:05,321 INFO L225 Difference]: With dead ends: 3388 [2022-03-15 21:19:05,321 INFO L226 Difference]: Without dead ends: 3387 [2022-03-15 21:19:05,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=824, Invalid=1626, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:19:05,321 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 57 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:05,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2022-03-15 21:19:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 2851. [2022-03-15 21:19:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 2.5810526315789475) internal successors, (7356), 2850 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 7356 transitions. [2022-03-15 21:19:05,350 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 7356 transitions. Word has length 25 [2022-03-15 21:19:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:05,350 INFO L470 AbstractCegarLoop]: Abstraction has 2851 states and 7356 transitions. [2022-03-15 21:19:05,350 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 21:19:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 7356 transitions. [2022-03-15 21:19:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:05,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:05,352 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:05,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:05,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-15 21:19:05,568 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1293051879, now seen corresponding path program 200 times [2022-03-15 21:19:05,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:05,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839799717] [2022-03-15 21:19:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:05,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:05,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839799717] [2022-03-15 21:19:05,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839799717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:05,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460114009] [2022-03-15 21:19:05,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:19:05,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:05,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:05,644 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:05,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-15 21:19:05,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:19:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:05,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:05,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:05,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 38 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:05,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460114009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:05,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:05,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:19:05,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [897562289] [2022-03-15 21:19:05,944 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:05,945 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:05,950 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 49 transitions. [2022-03-15 21:19:05,950 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:06,026 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1359981#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:19:06,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:19:06,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:06,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:19:06,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:19:06,026 INFO L87 Difference]: Start difference. First operand 2851 states and 7356 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 21:19:06,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:06,219 INFO L93 Difference]: Finished difference Result 3483 states and 8564 transitions. [2022-03-15 21:19:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:19:06,220 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 25 [2022-03-15 21:19:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:06,224 INFO L225 Difference]: With dead ends: 3483 [2022-03-15 21:19:06,224 INFO L226 Difference]: Without dead ends: 3483 [2022-03-15 21:19:06,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=669, Invalid=1311, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:19:06,225 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 73 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:06,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2022-03-15 21:19:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 2851. [2022-03-15 21:19:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 2.5810526315789475) internal successors, (7356), 2850 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 7356 transitions. [2022-03-15 21:19:06,257 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 7356 transitions. Word has length 25 [2022-03-15 21:19:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:06,257 INFO L470 AbstractCegarLoop]: Abstraction has 2851 states and 7356 transitions. [2022-03-15 21:19:06,257 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 21:19:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 7356 transitions. [2022-03-15 21:19:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:06,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:06,260 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:06,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-15 21:19:06,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-15 21:19:06,475 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:06,475 INFO L85 PathProgramCache]: Analyzing trace with hash 437745225, now seen corresponding path program 201 times [2022-03-15 21:19:06,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:06,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381331715] [2022-03-15 21:19:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:06,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:06,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:06,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381331715] [2022-03-15 21:19:06,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381331715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:06,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625400038] [2022-03-15 21:19:06,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:19:06,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:06,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:06,554 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:06,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-15 21:19:06,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:19:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:06,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:06,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:06,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625400038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:06,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:06,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 25 [2022-03-15 21:19:06,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [29312361] [2022-03-15 21:19:06,795 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:06,796 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:06,801 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 53 transitions. [2022-03-15 21:19:06,801 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:06,899 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1369374#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1369373#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:19:06,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:19:06,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:19:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:19:06,900 INFO L87 Difference]: Start difference. First operand 2851 states and 7356 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:19:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:07,175 INFO L93 Difference]: Finished difference Result 3547 states and 8694 transitions. [2022-03-15 21:19:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:19:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2022-03-15 21:19:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:07,180 INFO L225 Difference]: With dead ends: 3547 [2022-03-15 21:19:07,180 INFO L226 Difference]: Without dead ends: 3547 [2022-03-15 21:19:07,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:19:07,181 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 89 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:07,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2022-03-15 21:19:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2851. [2022-03-15 21:19:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 2.5810526315789475) internal successors, (7356), 2850 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 7356 transitions. [2022-03-15 21:19:07,215 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 7356 transitions. Word has length 25 [2022-03-15 21:19:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:07,215 INFO L470 AbstractCegarLoop]: Abstraction has 2851 states and 7356 transitions. [2022-03-15 21:19:07,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:19:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 7356 transitions. [2022-03-15 21:19:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:07,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:07,218 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:07,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:07,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:07,427 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash -306957273, now seen corresponding path program 202 times [2022-03-15 21:19:07,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:07,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168335644] [2022-03-15 21:19:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:07,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:07,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:07,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168335644] [2022-03-15 21:19:07,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168335644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:07,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814965362] [2022-03-15 21:19:07,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:19:07,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:07,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:07,536 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:07,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-15 21:19:07,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:19:07,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:07,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:07,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:07,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814965362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:07,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:07,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 26 [2022-03-15 21:19:07,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [200794933] [2022-03-15 21:19:07,784 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:07,785 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:07,790 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 57 transitions. [2022-03-15 21:19:07,790 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:07,913 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1378844#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1378843#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1378845#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:19:07,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:19:07,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:19:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:19:07,913 INFO L87 Difference]: Start difference. First operand 2851 states and 7356 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 21:19:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:08,335 INFO L93 Difference]: Finished difference Result 3564 states and 8723 transitions. [2022-03-15 21:19:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:19:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 25 [2022-03-15 21:19:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:08,340 INFO L225 Difference]: With dead ends: 3564 [2022-03-15 21:19:08,340 INFO L226 Difference]: Without dead ends: 3564 [2022-03-15 21:19:08,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1114, Invalid=2918, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:19:08,341 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 122 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:08,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-03-15 21:19:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2851. [2022-03-15 21:19:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 2.5810526315789475) internal successors, (7356), 2850 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 7356 transitions. [2022-03-15 21:19:08,384 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 7356 transitions. Word has length 25 [2022-03-15 21:19:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:08,384 INFO L470 AbstractCegarLoop]: Abstraction has 2851 states and 7356 transitions. [2022-03-15 21:19:08,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 21:19:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 7356 transitions. [2022-03-15 21:19:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:08,387 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:08,387 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:08,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:08,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:08,604 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1917898231, now seen corresponding path program 203 times [2022-03-15 21:19:08,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:08,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191273492] [2022-03-15 21:19:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:08,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:08,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:08,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191273492] [2022-03-15 21:19:08,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191273492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:08,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118641124] [2022-03-15 21:19:08,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:19:08,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:08,680 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-15 21:19:08,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:19:08,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:08,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:08,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118641124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:08,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:08,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17] total 26 [2022-03-15 21:19:08,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1824844585] [2022-03-15 21:19:08,973 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:08,974 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:08,980 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 61 transitions. [2022-03-15 21:19:08,980 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:09,164 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1388353#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1388354#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 1388351#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1388352#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:19:09,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:19:09,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:09,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:19:09,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:19:09,164 INFO L87 Difference]: Start difference. First operand 2851 states and 7356 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 21:19:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:09,652 INFO L93 Difference]: Finished difference Result 3495 states and 8578 transitions. [2022-03-15 21:19:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:19:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 21:19:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:09,657 INFO L225 Difference]: With dead ends: 3495 [2022-03-15 21:19:09,657 INFO L226 Difference]: Without dead ends: 3495 [2022-03-15 21:19:09,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1137, Invalid=3023, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:19:09,658 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 136 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:09,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:19:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2022-03-15 21:19:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2851. [2022-03-15 21:19:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 2.5810526315789475) internal successors, (7356), 2850 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 7356 transitions. [2022-03-15 21:19:09,688 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 7356 transitions. Word has length 25 [2022-03-15 21:19:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:09,688 INFO L470 AbstractCegarLoop]: Abstraction has 2851 states and 7356 transitions. [2022-03-15 21:19:09,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 21:19:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 7356 transitions. [2022-03-15 21:19:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:09,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:09,691 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:09,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:09,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-03-15 21:19:09,891 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash -317460377, now seen corresponding path program 204 times [2022-03-15 21:19:09,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:09,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745693283] [2022-03-15 21:19:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:09,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:10,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:10,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745693283] [2022-03-15 21:19:10,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745693283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:10,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994125677] [2022-03-15 21:19:10,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:19:10,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:10,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:10,032 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:10,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-15 21:19:10,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:19:10,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:10,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:10,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:10,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994125677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:10,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:10,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2022-03-15 21:19:10,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1052759316] [2022-03-15 21:19:10,335 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:10,336 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:10,341 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 65 transitions. [2022-03-15 21:19:10,341 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:10,611 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1397796#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 1397793#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1397792#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1397794#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1397795#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:19:10,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:19:10,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:19:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:19:10,612 INFO L87 Difference]: Start difference. First operand 2851 states and 7356 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 21:19:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:11,353 INFO L93 Difference]: Finished difference Result 3481 states and 8564 transitions. [2022-03-15 21:19:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 21:19:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 21:19:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:11,357 INFO L225 Difference]: With dead ends: 3481 [2022-03-15 21:19:11,357 INFO L226 Difference]: Without dead ends: 3481 [2022-03-15 21:19:11,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1529, Invalid=4477, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:19:11,358 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 151 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:11,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:19:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2022-03-15 21:19:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2851. [2022-03-15 21:19:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 2.5810526315789475) internal successors, (7356), 2850 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 7356 transitions. [2022-03-15 21:19:11,404 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 7356 transitions. Word has length 25 [2022-03-15 21:19:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:11,404 INFO L470 AbstractCegarLoop]: Abstraction has 2851 states and 7356 transitions. [2022-03-15 21:19:11,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 21:19:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 7356 transitions. [2022-03-15 21:19:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:11,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:11,407 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:11,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:11,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-15 21:19:11,607 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2051472841, now seen corresponding path program 205 times [2022-03-15 21:19:11,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:11,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417951028] [2022-03-15 21:19:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:11,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:11,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417951028] [2022-03-15 21:19:11,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417951028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:11,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691791972] [2022-03-15 21:19:11,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:19:11,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:11,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:11,683 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:11,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-15 21:19:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:11,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:11,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:11,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:11,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691791972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:11,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:11,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 27 [2022-03-15 21:19:11,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [634351298] [2022-03-15 21:19:11,889 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:11,890 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:11,896 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 69 transitions. [2022-03-15 21:19:11,896 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:12,059 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1407245#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 1407246#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 1407244#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1407243#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1407242#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1407247#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:19:12,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:19:12,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:19:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:19:12,060 INFO L87 Difference]: Start difference. First operand 2851 states and 7356 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) 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 21:19:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:12,547 INFO L93 Difference]: Finished difference Result 3339 states and 8276 transitions. [2022-03-15 21:19:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:19:12,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) 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 25 [2022-03-15 21:19:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:12,552 INFO L225 Difference]: With dead ends: 3339 [2022-03-15 21:19:12,552 INFO L226 Difference]: Without dead ends: 3339 [2022-03-15 21:19:12,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1369, Invalid=4181, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:19:12,553 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 159 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:12,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-03-15 21:19:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2851. [2022-03-15 21:19:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 2.5810526315789475) internal successors, (7356), 2850 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 7356 transitions. [2022-03-15 21:19:12,594 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 7356 transitions. Word has length 25 [2022-03-15 21:19:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:12,594 INFO L470 AbstractCegarLoop]: Abstraction has 2851 states and 7356 transitions. [2022-03-15 21:19:12,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) 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 21:19:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 7356 transitions. [2022-03-15 21:19:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:12,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:12,597 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:12,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:12,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:12,815 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:12,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1821008729, now seen corresponding path program 206 times [2022-03-15 21:19:12,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:12,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949416800] [2022-03-15 21:19:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:12,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:12,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:12,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949416800] [2022-03-15 21:19:12,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949416800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:12,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297379516] [2022-03-15 21:19:12,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:19:12,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:12,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:12,894 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:12,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-15 21:19:12,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:19:12,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:12,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 44 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:13,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297379516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:13,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:13,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19] total 28 [2022-03-15 21:19:13,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1303513139] [2022-03-15 21:19:13,069 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:13,070 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:13,076 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 73 transitions. [2022-03-15 21:19:13,076 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:13,257 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1416546#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1416550#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 1416547#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 1416544#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1416545#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1416549#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1416548#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:19:13,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:19:13,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:19:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:19:13,258 INFO L87 Difference]: Start difference. First operand 2851 states and 7356 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 21:19:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:13,930 INFO L93 Difference]: Finished difference Result 3369 states and 8398 transitions. [2022-03-15 21:19:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:19:13,930 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 21:19:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:13,935 INFO L225 Difference]: With dead ends: 3369 [2022-03-15 21:19:13,935 INFO L226 Difference]: Without dead ends: 3369 [2022-03-15 21:19:13,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1797, Invalid=5685, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:19:13,935 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 155 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:13,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 1 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2022-03-15 21:19:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 2819. [2022-03-15 21:19:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2818 states have (on average 2.574875798438609) internal successors, (7256), 2818 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 7256 transitions. [2022-03-15 21:19:13,966 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 7256 transitions. Word has length 25 [2022-03-15 21:19:13,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:13,966 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 7256 transitions. [2022-03-15 21:19:13,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 21:19:13,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 7256 transitions. [2022-03-15 21:19:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:19:13,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:13,968 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:13,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:14,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-03-15 21:19:14,184 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1608853111, now seen corresponding path program 207 times [2022-03-15 21:19:14,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:14,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012319659] [2022-03-15 21:19:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:14,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:14,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:14,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012319659] [2022-03-15 21:19:14,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012319659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:14,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986601044] [2022-03-15 21:19:14,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:19:14,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:14,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:14,263 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:14,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-15 21:19:14,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:19:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:14,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:19:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:14,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:14,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986601044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:14,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:14,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2022-03-15 21:19:14,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1522528807] [2022-03-15 21:19:14,440 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:14,441 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:14,448 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 81 transitions. [2022-03-15 21:19:14,449 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:14,666 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [1425840#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 1425834#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 1425833#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 1425835#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1425838#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1425839#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 1425836#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 1425837#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:19:14,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:19:14,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:14,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:19:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:19:14,667 INFO L87 Difference]: Start difference. First operand 2819 states and 7256 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 21:19:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:15,369 INFO L93 Difference]: Finished difference Result 3510 states and 8654 transitions. [2022-03-15 21:19:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 21:19:15,369 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 21:19:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:15,374 INFO L225 Difference]: With dead ends: 3510 [2022-03-15 21:19:15,374 INFO L226 Difference]: Without dead ends: 3510 [2022-03-15 21:19:15,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1886, Invalid=5946, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 21:19:15,377 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 170 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:15,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:19:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2022-03-15 21:19:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2812. [2022-03-15 21:19:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 2.5812877979366773) internal successors, (7256), 2811 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 7256 transitions. [2022-03-15 21:19:15,408 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 7256 transitions. Word has length 25 [2022-03-15 21:19:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:15,409 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 7256 transitions. [2022-03-15 21:19:15,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 21:19:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 7256 transitions. [2022-03-15 21:19:15,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:15,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:15,411 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:15,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-15 21:19:15,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:15,616 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1218628376, now seen corresponding path program 208 times [2022-03-15 21:19:15,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:15,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357633274] [2022-03-15 21:19:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:15,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:15,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357633274] [2022-03-15 21:19:15,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357633274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:15,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119945754] [2022-03-15 21:19:15,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:19:15,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:15,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:15,702 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:15,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-15 21:19:15,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:19:15,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 55 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:15,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 55 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:15,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119945754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:15,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:15,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 34 [2022-03-15 21:19:15,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1267598057] [2022-03-15 21:19:15,939 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:15,940 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:15,945 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 47 transitions. [2022-03-15 21:19:15,945 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:16,109 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [1435271#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1435274#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1435270#(< i2 (* 2 N)), 1435273#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 1435275#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 1435276#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 1435272#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1435278#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N))), 1435277#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N)))] [2022-03-15 21:19:16,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:19:16,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:19:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1433, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:19:16,125 INFO L87 Difference]: Start difference. First operand 2812 states and 7256 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 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 21:19:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:16,346 INFO L93 Difference]: Finished difference Result 3189 states and 7947 transitions. [2022-03-15 21:19:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:19:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 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 27 [2022-03-15 21:19:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:16,351 INFO L225 Difference]: With dead ends: 3189 [2022-03-15 21:19:16,351 INFO L226 Difference]: Without dead ends: 3189 [2022-03-15 21:19:16,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1051, Invalid=2609, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:19:16,352 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 123 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:16,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 1 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2022-03-15 21:19:16,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2857. [2022-03-15 21:19:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2856 states have (on average 2.5892857142857144) internal successors, (7395), 2856 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 7395 transitions. [2022-03-15 21:19:16,383 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 7395 transitions. Word has length 27 [2022-03-15 21:19:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:16,384 INFO L470 AbstractCegarLoop]: Abstraction has 2857 states and 7395 transitions. [2022-03-15 21:19:16,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 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 21:19:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 7395 transitions. [2022-03-15 21:19:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:16,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:16,386 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:16,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:16,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-03-15 21:19:16,599 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2044953283, now seen corresponding path program 209 times [2022-03-15 21:19:16,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:16,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165451541] [2022-03-15 21:19:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:16,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:16,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:16,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165451541] [2022-03-15 21:19:16,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165451541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:16,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270327613] [2022-03-15 21:19:16,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:19:16,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:16,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:16,743 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:16,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-15 21:19:16,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:19:16,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:16,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:16,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:16,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:16,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270327613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:16,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:16,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 31 [2022-03-15 21:19:16,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1221504018] [2022-03-15 21:19:16,936 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:16,937 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:16,942 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:19:16,942 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:17,101 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [1444404#(< i2 (* 2 N)), 1444411#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 1444408#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 1444410#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 1444406#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1444405#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1444412#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 1444409#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1444413#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N))), 1444407#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N)))] [2022-03-15 21:19:17,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:19:17,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:19:17,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:19:17,102 INFO L87 Difference]: Start difference. First operand 2857 states and 7395 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 31 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 21:19:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:17,335 INFO L93 Difference]: Finished difference Result 3058 states and 7665 transitions. [2022-03-15 21:19:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:19:17,335 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 31 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 27 [2022-03-15 21:19:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:17,339 INFO L225 Difference]: With dead ends: 3058 [2022-03-15 21:19:17,339 INFO L226 Difference]: Without dead ends: 3050 [2022-03-15 21:19:17,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1041, Invalid=2619, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:19:17,340 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 124 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:17,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2022-03-15 21:19:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 2829. [2022-03-15 21:19:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 2.5813295615275815) internal successors, (7300), 2828 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 7300 transitions. [2022-03-15 21:19:17,368 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 7300 transitions. Word has length 27 [2022-03-15 21:19:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:17,368 INFO L470 AbstractCegarLoop]: Abstraction has 2829 states and 7300 transitions. [2022-03-15 21:19:17,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 31 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 21:19:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 7300 transitions. [2022-03-15 21:19:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:17,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:17,371 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:17,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-15 21:19:17,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-15 21:19:17,587 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2082549437, now seen corresponding path program 210 times [2022-03-15 21:19:17,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:17,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951503278] [2022-03-15 21:19:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:17,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:17,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:17,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951503278] [2022-03-15 21:19:17,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951503278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:17,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051779535] [2022-03-15 21:19:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:19:17,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:17,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:17,637 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:17,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-15 21:19:17,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:19:17,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:17,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:17,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:17,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:17,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051779535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:17,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:17,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:19:17,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2029683981] [2022-03-15 21:19:17,860 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:17,862 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:17,866 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 35 transitions. [2022-03-15 21:19:17,866 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:17,892 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1453352#(< i1 (* 2 N)), 1453354#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1453353#(< i2 (* 2 N))] [2022-03-15 21:19:17,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:19:17,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:19:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:19:17,893 INFO L87 Difference]: Start difference. First operand 2829 states and 7300 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:19:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:18,124 INFO L93 Difference]: Finished difference Result 3140 states and 7860 transitions. [2022-03-15 21:19:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:19:18,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 27 [2022-03-15 21:19:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:18,128 INFO L225 Difference]: With dead ends: 3140 [2022-03-15 21:19:18,128 INFO L226 Difference]: Without dead ends: 3134 [2022-03-15 21:19:18,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1101, Invalid=2559, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:19:18,129 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:18,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2022-03-15 21:19:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 2819. [2022-03-15 21:19:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2818 states have (on average 2.578069552874379) internal successors, (7265), 2818 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 7265 transitions. [2022-03-15 21:19:18,174 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 7265 transitions. Word has length 27 [2022-03-15 21:19:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:18,174 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 7265 transitions. [2022-03-15 21:19:18,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:19:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 7265 transitions. [2022-03-15 21:19:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:18,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:18,177 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:18,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:18,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-15 21:19:18,393 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash -325232119, now seen corresponding path program 211 times [2022-03-15 21:19:18,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:18,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409339347] [2022-03-15 21:19:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:18,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:18,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:18,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409339347] [2022-03-15 21:19:18,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409339347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:18,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033701005] [2022-03-15 21:19:18,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:19:18,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:18,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:18,440 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:18,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-15 21:19:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:18,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:18,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033701005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:18,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:18,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:19:18,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1993040015] [2022-03-15 21:19:18,656 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:18,657 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:18,662 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2022-03-15 21:19:18,662 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:18,706 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1462378#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1462379#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1462377#(< i2 (* 2 N))] [2022-03-15 21:19:18,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:19:18,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:19:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=576, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:19:18,707 INFO L87 Difference]: Start difference. First operand 2819 states and 7265 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 21:19:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:19,259 INFO L93 Difference]: Finished difference Result 3803 states and 9202 transitions. [2022-03-15 21:19:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 21:19:19,259 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 27 [2022-03-15 21:19:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:19,265 INFO L225 Difference]: With dead ends: 3803 [2022-03-15 21:19:19,265 INFO L226 Difference]: Without dead ends: 3794 [2022-03-15 21:19:19,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1664, Invalid=4342, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:19:19,266 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 116 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:19,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:19:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2022-03-15 21:19:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2977. [2022-03-15 21:19:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 2.612231182795699) internal successors, (7774), 2976 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 7774 transitions. [2022-03-15 21:19:19,303 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 7774 transitions. Word has length 27 [2022-03-15 21:19:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:19,303 INFO L470 AbstractCegarLoop]: Abstraction has 2977 states and 7774 transitions. [2022-03-15 21:19:19,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 21:19:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 7774 transitions. [2022-03-15 21:19:19,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:19,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:19,307 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:19,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-15 21:19:19,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-15 21:19:19,515 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2131988285, now seen corresponding path program 212 times [2022-03-15 21:19:19,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:19,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279082788] [2022-03-15 21:19:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:19,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:19,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279082788] [2022-03-15 21:19:19,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279082788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:19,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42228260] [2022-03-15 21:19:19,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:19:19,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:19,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:19,578 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:19,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-15 21:19:19,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:19:19,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:19,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:19,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:19,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42228260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:19,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:19,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:19:19,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [519971050] [2022-03-15 21:19:19,787 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:19,789 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:19,793 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2022-03-15 21:19:19,793 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:19,810 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1472414#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1472413#(< i2 (* 2 N))] [2022-03-15 21:19:19,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:19:19,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:19:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:19:19,811 INFO L87 Difference]: Start difference. First operand 2977 states and 7774 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:19,950 INFO L93 Difference]: Finished difference Result 4025 states and 9869 transitions. [2022-03-15 21:19:19,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:19:19,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 27 [2022-03-15 21:19:19,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:19,955 INFO L225 Difference]: With dead ends: 4025 [2022-03-15 21:19:19,955 INFO L226 Difference]: Without dead ends: 4023 [2022-03-15 21:19:19,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=571, Invalid=989, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:19:19,956 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 94 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:19,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2022-03-15 21:19:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3070. [2022-03-15 21:19:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 3069 states have (on average 2.628869338546758) internal successors, (8068), 3069 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 8068 transitions. [2022-03-15 21:19:19,993 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 8068 transitions. Word has length 27 [2022-03-15 21:19:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:19,993 INFO L470 AbstractCegarLoop]: Abstraction has 3070 states and 8068 transitions. [2022-03-15 21:19:19,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 8068 transitions. [2022-03-15 21:19:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:19,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:19,996 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:20,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:20,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:20,212 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1382982980, now seen corresponding path program 213 times [2022-03-15 21:19:20,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:20,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970159203] [2022-03-15 21:19:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 42 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:20,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:20,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970159203] [2022-03-15 21:19:20,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970159203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:20,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303451029] [2022-03-15 21:19:20,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:19:20,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:20,258 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:20,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-15 21:19:20,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:19:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:20,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:19:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-15 21:19:20,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-15 21:19:20,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303451029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:20,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:20,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 4] total 27 [2022-03-15 21:19:20,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1904984306] [2022-03-15 21:19:20,525 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:20,526 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:20,531 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 47 transitions. [2022-03-15 21:19:20,531 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:20,647 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [1482793#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1482791#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1482789#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1482792#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1482719#(< i2 (* 2 N)), 1482788#(< i1 (* 2 N)), 1482790#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1482794#(<= (* 2 N) (+ i2 1))] [2022-03-15 21:19:20,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:19:20,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:19:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:19:20,648 INFO L87 Difference]: Start difference. First operand 3070 states and 8068 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:21,214 INFO L93 Difference]: Finished difference Result 3807 states and 9427 transitions. [2022-03-15 21:19:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 21:19:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 21:19:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:21,219 INFO L225 Difference]: With dead ends: 3807 [2022-03-15 21:19:21,219 INFO L226 Difference]: Without dead ends: 3783 [2022-03-15 21:19:21,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1026, Invalid=5294, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:19:21,220 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 94 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:21,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2022-03-15 21:19:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3055. [2022-03-15 21:19:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3055 states, 3054 states have (on average 2.6218074656188604) internal successors, (8007), 3054 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 8007 transitions. [2022-03-15 21:19:21,254 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 8007 transitions. Word has length 27 [2022-03-15 21:19:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:21,254 INFO L470 AbstractCegarLoop]: Abstraction has 3055 states and 8007 transitions. [2022-03-15 21:19:21,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 8007 transitions. [2022-03-15 21:19:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:21,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:21,257 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:21,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:21,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-03-15 21:19:21,471 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash 64268519, now seen corresponding path program 214 times [2022-03-15 21:19:21,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:21,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764126978] [2022-03-15 21:19:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:21,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:21,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:21,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764126978] [2022-03-15 21:19:21,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764126978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:21,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648745118] [2022-03-15 21:19:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:19:21,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:21,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:21,529 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:21,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-15 21:19:21,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:19:21,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:21,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:21,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:21,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648745118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:21,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:21,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:19:21,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [609845321] [2022-03-15 21:19:21,735 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:21,737 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:21,743 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2022-03-15 21:19:21,743 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:21,815 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1492986#(< i2 (* 2 N)), 1492989#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1492987#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1492988#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:19:21,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:19:21,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:19:21,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=636, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:19:21,816 INFO L87 Difference]: Start difference. First operand 3055 states and 8007 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 21:19:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:22,634 INFO L93 Difference]: Finished difference Result 4443 states and 10690 transitions. [2022-03-15 21:19:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 21:19:22,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 27 [2022-03-15 21:19:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:22,640 INFO L225 Difference]: With dead ends: 4443 [2022-03-15 21:19:22,640 INFO L226 Difference]: Without dead ends: 4420 [2022-03-15 21:19:22,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2367, Invalid=7335, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 21:19:22,641 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 143 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:22,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:19:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2022-03-15 21:19:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3208. [2022-03-15 21:19:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 2.651387589647646) internal successors, (8503), 3207 states have internal predecessors, (8503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 8503 transitions. [2022-03-15 21:19:22,679 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 8503 transitions. Word has length 27 [2022-03-15 21:19:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:22,679 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 8503 transitions. [2022-03-15 21:19:22,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 21:19:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 8503 transitions. [2022-03-15 21:19:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:22,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:22,697 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:22,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:22,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:22,913 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1331429437, now seen corresponding path program 215 times [2022-03-15 21:19:22,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:22,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842413761] [2022-03-15 21:19:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:22,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:22,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:22,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842413761] [2022-03-15 21:19:22,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842413761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:22,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050464983] [2022-03-15 21:19:22,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:19:22,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:22,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:22,976 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:22,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-15 21:19:23,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:19:23,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:23,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:23,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:23,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050464983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:23,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:23,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:19:23,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1690844684] [2022-03-15 21:19:23,200 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:23,201 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:23,205 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2022-03-15 21:19:23,206 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:23,223 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1504166#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1504165#(< i2 (* 2 N))] [2022-03-15 21:19:23,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:19:23,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:23,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:19:23,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:19:23,223 INFO L87 Difference]: Start difference. First operand 3208 states and 8503 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:23,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:23,335 INFO L93 Difference]: Finished difference Result 4426 states and 10922 transitions. [2022-03-15 21:19:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:19:23,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 27 [2022-03-15 21:19:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:23,341 INFO L225 Difference]: With dead ends: 4426 [2022-03-15 21:19:23,341 INFO L226 Difference]: Without dead ends: 4424 [2022-03-15 21:19:23,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=878, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:19:23,348 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 97 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:23,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2022-03-15 21:19:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 3286. [2022-03-15 21:19:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 2.667275494672755) internal successors, (8762), 3285 states have internal predecessors, (8762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 8762 transitions. [2022-03-15 21:19:23,388 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 8762 transitions. Word has length 27 [2022-03-15 21:19:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 8762 transitions. [2022-03-15 21:19:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 8762 transitions. [2022-03-15 21:19:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:23,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:23,391 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:23,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:23,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:23,607 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:23,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1092343946, now seen corresponding path program 216 times [2022-03-15 21:19:23,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:23,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030037243] [2022-03-15 21:19:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 38 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:23,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:23,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030037243] [2022-03-15 21:19:23,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030037243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:23,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914596038] [2022-03-15 21:19:23,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:19:23,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:23,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:23,654 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:23,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-15 21:19:23,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:19:23,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:23,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:23,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:23,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:23,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914596038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:23,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:23,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 18] total 29 [2022-03-15 21:19:23,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1516184983] [2022-03-15 21:19:23,864 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:23,865 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:23,870 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 51 transitions. [2022-03-15 21:19:23,870 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:23,985 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [1515379#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1515378#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1515376#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1515377#(< i1 (* 2 N)), 1515371#(< i2 (* 2 N)), 1515375#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1515372#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1515299#(<= (* 2 N) (+ 2 i2)), 1515374#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1515373#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:19:23,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:19:23,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:19:23,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:19:23,986 INFO L87 Difference]: Start difference. First operand 3286 states and 8762 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) 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 21:19:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:24,745 INFO L93 Difference]: Finished difference Result 4271 states and 10669 transitions. [2022-03-15 21:19:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 21:19:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 27 [2022-03-15 21:19:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:24,751 INFO L225 Difference]: With dead ends: 4271 [2022-03-15 21:19:24,751 INFO L226 Difference]: Without dead ends: 4233 [2022-03-15 21:19:24,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2432, Invalid=8698, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 21:19:24,753 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 142 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:24,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:19:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2022-03-15 21:19:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 3273. [2022-03-15 21:19:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.6604523227383865) internal successors, (8705), 3272 states have internal predecessors, (8705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 8705 transitions. [2022-03-15 21:19:24,791 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 8705 transitions. Word has length 27 [2022-03-15 21:19:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:24,791 INFO L470 AbstractCegarLoop]: Abstraction has 3273 states and 8705 transitions. [2022-03-15 21:19:24,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 21:19:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 8705 transitions. [2022-03-15 21:19:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:24,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:24,794 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:24,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:25,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-03-15 21:19:25,010 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash -746113591, now seen corresponding path program 217 times [2022-03-15 21:19:25,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:25,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607068734] [2022-03-15 21:19:25,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:25,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:25,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:25,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607068734] [2022-03-15 21:19:25,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607068734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:25,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973580181] [2022-03-15 21:19:25,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:19:25,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:25,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:25,057 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:25,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-15 21:19:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:25,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:25,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:25,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973580181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:25,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:25,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:19:25,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1216428846] [2022-03-15 21:19:25,298 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:25,300 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:25,306 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 47 transitions. [2022-03-15 21:19:25,306 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:25,392 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1526519#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1526516#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1526518#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1526517#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1526515#(< i2 (* 2 N))] [2022-03-15 21:19:25,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:19:25,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:25,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:19:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:19:25,392 INFO L87 Difference]: Start difference. First operand 3273 states and 8705 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 21:19:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:26,356 INFO L93 Difference]: Finished difference Result 4895 states and 11792 transitions. [2022-03-15 21:19:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 21:19:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 27 [2022-03-15 21:19:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:26,362 INFO L225 Difference]: With dead ends: 4895 [2022-03-15 21:19:26,363 INFO L226 Difference]: Without dead ends: 4858 [2022-03-15 21:19:26,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2868, Invalid=8904, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 21:19:26,364 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 153 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:26,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:19:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2022-03-15 21:19:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 3433. [2022-03-15 21:19:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 2.6826923076923075) internal successors, (9207), 3432 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 9207 transitions. [2022-03-15 21:19:26,407 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 9207 transitions. Word has length 27 [2022-03-15 21:19:26,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:26,407 INFO L470 AbstractCegarLoop]: Abstraction has 3433 states and 9207 transitions. [2022-03-15 21:19:26,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 21:19:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 9207 transitions. [2022-03-15 21:19:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:26,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:26,410 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:26,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-15 21:19:26,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:26,618 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2011058371, now seen corresponding path program 218 times [2022-03-15 21:19:26,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:26,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684559531] [2022-03-15 21:19:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:26,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:26,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684559531] [2022-03-15 21:19:26,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684559531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:26,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345343748] [2022-03-15 21:19:26,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:19:26,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:26,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:26,682 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:26,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-15 21:19:26,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:19:26,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:26,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:26,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:26,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345343748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:26,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:26,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:19:26,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1381351647] [2022-03-15 21:19:26,872 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:26,874 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:26,878 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2022-03-15 21:19:26,878 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:26,896 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1538615#(< i2 (* 2 N)), 1538616#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:19:26,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:19:26,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:26,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:19:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:19:26,896 INFO L87 Difference]: Start difference. First operand 3433 states and 9207 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:27,001 INFO L93 Difference]: Finished difference Result 4691 states and 11695 transitions. [2022-03-15 21:19:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:19:27,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 27 [2022-03-15 21:19:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:27,007 INFO L225 Difference]: With dead ends: 4691 [2022-03-15 21:19:27,007 INFO L226 Difference]: Without dead ends: 4689 [2022-03-15 21:19:27,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=483, Invalid=777, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:19:27,008 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 90 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:27,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2022-03-15 21:19:27,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 3501. [2022-03-15 21:19:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3500 states have (on average 2.696) internal successors, (9436), 3500 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 9436 transitions. [2022-03-15 21:19:27,072 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 9436 transitions. Word has length 27 [2022-03-15 21:19:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:27,073 INFO L470 AbstractCegarLoop]: Abstraction has 3501 states and 9436 transitions. [2022-03-15 21:19:27,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 9436 transitions. [2022-03-15 21:19:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:27,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:27,076 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:27,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:27,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:27,296 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:27,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:27,297 INFO L85 PathProgramCache]: Analyzing trace with hash 672468484, now seen corresponding path program 219 times [2022-03-15 21:19:27,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:27,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706537338] [2022-03-15 21:19:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:27,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:27,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:27,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706537338] [2022-03-15 21:19:27,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706537338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:27,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029848338] [2022-03-15 21:19:27,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:19:27,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:27,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:27,346 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:27,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-15 21:19:27,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:19:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:19:27,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-15 21:19:27,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-15 21:19:27,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029848338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:27,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:27,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 4] total 29 [2022-03-15 21:19:27,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [451268760] [2022-03-15 21:19:27,597 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:27,599 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:27,604 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 55 transitions. [2022-03-15 21:19:27,604 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:27,792 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [1550513#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1550515#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1550443#(< i2 (* 2 N)), 1550519#(< i1 (* 2 N)), 1550520#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1550517#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1550512#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1550514#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1550521#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1550516#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1550518#(<= (* 2 N) (+ 3 i2)), 1550522#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N)))] [2022-03-15 21:19:27,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:19:27,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:19:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:19:27,793 INFO L87 Difference]: Start difference. First operand 3501 states and 9436 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) 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 21:19:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:28,888 INFO L93 Difference]: Finished difference Result 4565 states and 11503 transitions. [2022-03-15 21:19:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 21:19:28,889 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) 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 21:19:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:28,894 INFO L225 Difference]: With dead ends: 4565 [2022-03-15 21:19:28,894 INFO L226 Difference]: Without dead ends: 4517 [2022-03-15 21:19:28,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1901, Invalid=10755, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 21:19:28,896 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 159 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:28,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:19:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2022-03-15 21:19:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 3492. [2022-03-15 21:19:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.6900601546834717) internal successors, (9391), 3491 states have internal predecessors, (9391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9391 transitions. [2022-03-15 21:19:28,936 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9391 transitions. Word has length 27 [2022-03-15 21:19:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:28,936 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 9391 transitions. [2022-03-15 21:19:28,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) 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 21:19:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9391 transitions. [2022-03-15 21:19:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:28,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:28,940 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:28,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-15 21:19:29,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-15 21:19:29,150 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash -98155225, now seen corresponding path program 220 times [2022-03-15 21:19:29,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:29,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876271468] [2022-03-15 21:19:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:29,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:29,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:29,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876271468] [2022-03-15 21:19:29,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876271468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:29,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239454530] [2022-03-15 21:19:29,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:19:29,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:29,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:29,213 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:29,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-15 21:19:29,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:19:29,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:29,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:29,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239454530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:29,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:29,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:19:29,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2133348611] [2022-03-15 21:19:29,436 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:29,437 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:29,442 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 51 transitions. [2022-03-15 21:19:29,442 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:29,552 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1562403#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1562400#(< i2 (* 2 N)), 1562405#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1562401#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1562404#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1562402#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:19:29,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:19:29,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:19:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=762, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:19:29,553 INFO L87 Difference]: Start difference. First operand 3492 states and 9391 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 21:19:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:31,643 INFO L93 Difference]: Finished difference Result 5442 states and 13128 transitions. [2022-03-15 21:19:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-15 21:19:31,643 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 27 [2022-03-15 21:19:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:31,651 INFO L225 Difference]: With dead ends: 5442 [2022-03-15 21:19:31,651 INFO L226 Difference]: Without dead ends: 5389 [2022-03-15 21:19:31,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7704 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4285, Invalid=16307, Unknown=0, NotChecked=0, Total=20592 [2022-03-15 21:19:31,653 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 228 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:31,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:19:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5389 states. [2022-03-15 21:19:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5389 to 3657. [2022-03-15 21:19:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3656 states have (on average 2.7048687089715537) internal successors, (9889), 3656 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 9889 transitions. [2022-03-15 21:19:31,707 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 9889 transitions. Word has length 27 [2022-03-15 21:19:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:31,707 INFO L470 AbstractCegarLoop]: Abstraction has 3657 states and 9889 transitions. [2022-03-15 21:19:31,707 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 21:19:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 9889 transitions. [2022-03-15 21:19:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:31,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:31,711 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:31,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:31,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-15 21:19:31,918 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1746001981, now seen corresponding path program 221 times [2022-03-15 21:19:31,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:31,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365816456] [2022-03-15 21:19:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:31,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:31,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:31,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365816456] [2022-03-15 21:19:31,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365816456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:31,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137246677] [2022-03-15 21:19:31,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:19:31,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:31,978 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:31,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-15 21:19:32,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:19:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:32,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:32,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:32,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137246677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:32,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:32,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:19:32,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2116711734] [2022-03-15 21:19:32,232 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:32,234 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:32,238 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2022-03-15 21:19:32,238 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:32,256 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1575565#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1575564#(< i2 (* 2 N))] [2022-03-15 21:19:32,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:19:32,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:19:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:19:32,257 INFO L87 Difference]: Start difference. First operand 3657 states and 9889 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:32,352 INFO L93 Difference]: Finished difference Result 4865 states and 12244 transitions. [2022-03-15 21:19:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:19:32,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 27 [2022-03-15 21:19:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:32,359 INFO L225 Difference]: With dead ends: 4865 [2022-03-15 21:19:32,359 INFO L226 Difference]: Without dead ends: 4863 [2022-03-15 21:19:32,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=436, Invalid=686, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:19:32,360 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 96 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:32,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2022-03-15 21:19:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 3715. [2022-03-15 21:19:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3715 states, 3714 states have (on average 2.7162089391491655) internal successors, (10088), 3714 states have internal predecessors, (10088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 10088 transitions. [2022-03-15 21:19:32,431 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 10088 transitions. Word has length 27 [2022-03-15 21:19:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:32,431 INFO L470 AbstractCegarLoop]: Abstraction has 3715 states and 10088 transitions. [2022-03-15 21:19:32,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 10088 transitions. [2022-03-15 21:19:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:32,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:32,435 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:32,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-15 21:19:32,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-15 21:19:32,647 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:32,648 INFO L85 PathProgramCache]: Analyzing trace with hash 541231050, now seen corresponding path program 222 times [2022-03-15 21:19:32,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:32,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509514305] [2022-03-15 21:19:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:32,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:32,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:32,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509514305] [2022-03-15 21:19:32,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509514305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:32,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285923614] [2022-03-15 21:19:32,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:19:32,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:32,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:32,734 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:32,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-15 21:19:32,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:19:32,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:32,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:32,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:33,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285923614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:33,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:33,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 19] total 30 [2022-03-15 21:19:33,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1093390602] [2022-03-15 21:19:33,019 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:33,020 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:33,026 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 59 transitions. [2022-03-15 21:19:33,026 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:33,300 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [1588072#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1588062#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1587995#(<= (* 2 N) (+ i2 4)), 1588061#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1588063#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1588060#(< i2 (* 2 N)), 1588067#(< i1 (* 2 N)), 1588071#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 1588064#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1588069#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1588066#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1588065#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1588070#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 1588068#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2))] [2022-03-15 21:19:33,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:19:33,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:19:33,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1467, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:19:33,300 INFO L87 Difference]: Start difference. First operand 3715 states and 10088 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 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 21:19:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:35,513 INFO L93 Difference]: Finished difference Result 5070 states and 12859 transitions. [2022-03-15 21:19:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-15 21:19:35,513 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 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 21:19:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:35,519 INFO L225 Difference]: With dead ends: 5070 [2022-03-15 21:19:35,519 INFO L226 Difference]: Without dead ends: 4990 [2022-03-15 21:19:35,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7865 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4178, Invalid=18472, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 21:19:35,522 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 277 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:35,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:19:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2022-03-15 21:19:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 3708. [2022-03-15 21:19:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.710277852711087) internal successors, (10047), 3707 states have internal predecessors, (10047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10047 transitions. [2022-03-15 21:19:35,564 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10047 transitions. Word has length 27 [2022-03-15 21:19:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:35,564 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 10047 transitions. [2022-03-15 21:19:35,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 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 21:19:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10047 transitions. [2022-03-15 21:19:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:35,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:35,568 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:35,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:35,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-15 21:19:35,784 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1486282359, now seen corresponding path program 223 times [2022-03-15 21:19:35,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:35,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353193106] [2022-03-15 21:19:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:35,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:35,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353193106] [2022-03-15 21:19:35,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353193106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:35,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457454845] [2022-03-15 21:19:35,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:19:35,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:35,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:35,834 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:35,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-15 21:19:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:35,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:35,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:35,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:36,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457454845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:36,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:36,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:19:36,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2054063389] [2022-03-15 21:19:36,082 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:36,084 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:36,090 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 55 transitions. [2022-03-15 21:19:36,090 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:36,238 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1600962#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1600963#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1600958#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1600959#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1600957#(< i2 (* 2 N)), 1600960#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1600961#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2)))] [2022-03-15 21:19:36,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:19:36,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:36,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:19:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=828, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:19:36,239 INFO L87 Difference]: Start difference. First operand 3708 states and 10047 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 21:19:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:37,995 INFO L93 Difference]: Finished difference Result 5890 states and 14178 transitions. [2022-03-15 21:19:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-15 21:19:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 27 [2022-03-15 21:19:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:38,003 INFO L225 Difference]: With dead ends: 5890 [2022-03-15 21:19:38,003 INFO L226 Difference]: Without dead ends: 5819 [2022-03-15 21:19:38,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9577 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4997, Invalid=20443, Unknown=0, NotChecked=0, Total=25440 [2022-03-15 21:19:38,006 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 262 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:38,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 1 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:19:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5819 states. [2022-03-15 21:19:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5819 to 3880. [2022-03-15 21:19:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3880 states, 3879 states have (on average 2.720804331013148) internal successors, (10554), 3879 states have internal predecessors, (10554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3880 states to 3880 states and 10554 transitions. [2022-03-15 21:19:38,085 INFO L78 Accepts]: Start accepts. Automaton has 3880 states and 10554 transitions. Word has length 27 [2022-03-15 21:19:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:38,086 INFO L470 AbstractCegarLoop]: Abstraction has 3880 states and 10554 transitions. [2022-03-15 21:19:38,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 21:19:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3880 states and 10554 transitions. [2022-03-15 21:19:38,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:38,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:38,090 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:38,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:38,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-03-15 21:19:38,305 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2044211395, now seen corresponding path program 224 times [2022-03-15 21:19:38,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:38,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215537421] [2022-03-15 21:19:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:38,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:38,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:38,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215537421] [2022-03-15 21:19:38,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215537421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:38,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998440575] [2022-03-15 21:19:38,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:19:38,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:38,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:38,370 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:38,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-15 21:19:38,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:19:38,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:38,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:38,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:38,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998440575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:38,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:38,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:19:38,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [198300790] [2022-03-15 21:19:38,662 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:38,663 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:38,667 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2022-03-15 21:19:38,668 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:38,696 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1615047#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1615046#(< i2 (* 2 N))] [2022-03-15 21:19:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:19:38,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:19:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:19:38,697 INFO L87 Difference]: Start difference. First operand 3880 states and 10554 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:38,835 INFO L93 Difference]: Finished difference Result 4930 states and 12552 transitions. [2022-03-15 21:19:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:19:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 27 [2022-03-15 21:19:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:38,843 INFO L225 Difference]: With dead ends: 4930 [2022-03-15 21:19:38,843 INFO L226 Difference]: Without dead ends: 4928 [2022-03-15 21:19:38,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=605, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:19:38,844 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 82 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:38,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2022-03-15 21:19:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3928. [2022-03-15 21:19:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.7305831423478484) internal successors, (10723), 3927 states have internal predecessors, (10723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10723 transitions. [2022-03-15 21:19:38,894 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10723 transitions. Word has length 27 [2022-03-15 21:19:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:38,894 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 10723 transitions. [2022-03-15 21:19:38,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10723 transitions. [2022-03-15 21:19:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:38,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:38,897 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:38,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:39,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:39,111 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash 767837892, now seen corresponding path program 225 times [2022-03-15 21:19:39,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:39,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329093953] [2022-03-15 21:19:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:39,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 38 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:39,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:39,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329093953] [2022-03-15 21:19:39,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329093953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:39,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990344060] [2022-03-15 21:19:39,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:19:39,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:39,206 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:39,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-15 21:19:39,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:19:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:39,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:19:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-15 21:19:39,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-15 21:19:39,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990344060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:39,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:39,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 4] total 31 [2022-03-15 21:19:39,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [964234851] [2022-03-15 21:19:39,600 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:39,602 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:39,608 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 63 transitions. [2022-03-15 21:19:39,608 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:40,039 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [1628032#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1628043#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 1628030#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1628033#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1628041#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 1628040#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1628039#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1628042#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1628031#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1627961#(< i2 (* 2 N)), 1628037#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1628034#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1628036#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 1628044#(<= (* 2 N) (+ 5 i2)), 1628038#(< i1 (* 2 N)), 1628035#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:19:40,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:19:40,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:19:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:19:40,040 INFO L87 Difference]: Start difference. First operand 3928 states and 10723 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 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 21:19:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:42,598 INFO L93 Difference]: Finished difference Result 5325 states and 13557 transitions. [2022-03-15 21:19:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-15 21:19:42,599 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 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 27 [2022-03-15 21:19:42,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:42,608 INFO L225 Difference]: With dead ends: 5325 [2022-03-15 21:19:42,608 INFO L226 Difference]: Without dead ends: 5217 [2022-03-15 21:19:42,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7773 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3426, Invalid=21696, Unknown=0, NotChecked=0, Total=25122 [2022-03-15 21:19:42,611 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 377 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:42,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:19:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2022-03-15 21:19:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 3925. [2022-03-15 21:19:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3924 states have (on average 2.7250254841997963) internal successors, (10693), 3924 states have internal predecessors, (10693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 10693 transitions. [2022-03-15 21:19:42,667 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 10693 transitions. Word has length 27 [2022-03-15 21:19:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:42,668 INFO L470 AbstractCegarLoop]: Abstraction has 3925 states and 10693 transitions. [2022-03-15 21:19:42,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 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 21:19:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 10693 transitions. [2022-03-15 21:19:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:42,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:42,672 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:42,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:42,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:42,884 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:42,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1568550553, now seen corresponding path program 226 times [2022-03-15 21:19:42,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:42,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107001736] [2022-03-15 21:19:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:42,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:42,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107001736] [2022-03-15 21:19:42,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107001736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:42,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556960911] [2022-03-15 21:19:42,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:19:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:42,953 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:42,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-15 21:19:42,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:19:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:42,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:43,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:43,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556960911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:43,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:43,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:19:43,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [440025202] [2022-03-15 21:19:43,266 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:43,267 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:43,273 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 59 transitions. [2022-03-15 21:19:43,273 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:43,501 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [1641630#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1641635#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 1641629#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1641633#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1641628#(< i2 (* 2 N)), 1641631#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1641632#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1641634#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:19:43,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:19:43,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:19:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:19:43,501 INFO L87 Difference]: Start difference. First operand 3925 states and 10693 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 21:19:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:47,114 INFO L93 Difference]: Finished difference Result 6786 states and 16206 transitions. [2022-03-15 21:19:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2022-03-15 21:19:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 27 [2022-03-15 21:19:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:47,124 INFO L225 Difference]: With dead ends: 6786 [2022-03-15 21:19:47,124 INFO L226 Difference]: Without dead ends: 6695 [2022-03-15 21:19:47,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21599 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8328, Invalid=44802, Unknown=0, NotChecked=0, Total=53130 [2022-03-15 21:19:47,130 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 370 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:47,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:19:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6695 states. [2022-03-15 21:19:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6695 to 4100. [2022-03-15 21:19:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4100 states, 4099 states have (on average 2.730178092217614) internal successors, (11191), 4099 states have internal predecessors, (11191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4100 states to 4100 states and 11191 transitions. [2022-03-15 21:19:47,206 INFO L78 Accepts]: Start accepts. Automaton has 4100 states and 11191 transitions. Word has length 27 [2022-03-15 21:19:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:47,206 INFO L470 AbstractCegarLoop]: Abstraction has 4100 states and 11191 transitions. [2022-03-15 21:19:47,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 21:19:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4100 states and 11191 transitions. [2022-03-15 21:19:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:47,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:47,211 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:47,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-03-15 21:19:47,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-03-15 21:19:47,423 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash -718258237, now seen corresponding path program 227 times [2022-03-15 21:19:47,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:47,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259112324] [2022-03-15 21:19:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:47,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:47,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:47,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259112324] [2022-03-15 21:19:47,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259112324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:47,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196494800] [2022-03-15 21:19:47,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:19:47,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:47,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:47,496 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:47,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-15 21:19:47,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:19:47,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:47,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:47,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:47,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196494800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:47,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:47,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:19:47,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2017613416] [2022-03-15 21:19:47,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:47,778 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:47,782 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2022-03-15 21:19:47,782 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:47,802 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1657195#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1657194#(< i2 (* 2 N))] [2022-03-15 21:19:47,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:19:47,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:19:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:19:47,803 INFO L87 Difference]: Start difference. First operand 4100 states and 11191 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:47,890 INFO L93 Difference]: Finished difference Result 4890 states and 12579 transitions. [2022-03-15 21:19:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:19:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 27 [2022-03-15 21:19:47,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:47,897 INFO L225 Difference]: With dead ends: 4890 [2022-03-15 21:19:47,897 INFO L226 Difference]: Without dead ends: 4888 [2022-03-15 21:19:47,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=336, Invalid=534, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:19:47,898 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 88 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:47,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2022-03-15 21:19:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 4128. [2022-03-15 21:19:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.736854858250545) internal successors, (11295), 4127 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11295 transitions. [2022-03-15 21:19:47,972 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11295 transitions. Word has length 27 [2022-03-15 21:19:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:47,972 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 11295 transitions. [2022-03-15 21:19:47,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 21:19:47,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11295 transitions. [2022-03-15 21:19:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:47,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:47,977 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:47,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-15 21:19:48,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:48,191 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:48,191 INFO L85 PathProgramCache]: Analyzing trace with hash -797284598, now seen corresponding path program 228 times [2022-03-15 21:19:48,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:48,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714067982] [2022-03-15 21:19:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:48,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 42 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:19:48,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:48,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714067982] [2022-03-15 21:19:48,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714067982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:48,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641232912] [2022-03-15 21:19:48,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:19:48,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:48,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:48,306 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:48,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-15 21:19:48,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:19:48,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 40 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:48,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 40 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:48,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641232912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:48,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:48,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 20] total 31 [2022-03-15 21:19:48,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1740686359] [2022-03-15 21:19:48,616 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:48,618 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:48,626 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 67 transitions. [2022-03-15 21:19:48,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:49,013 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 18 new interpolants: [1670476#(<= (* 2 N) (+ 6 i2)), 1670545#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 1670540#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1670543#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1670542#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 1670544#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1670539#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1670550#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 1670538#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1670536#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1670548#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1670534#(< i2 (* 2 N)), 1670535#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1670549#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 1670546#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1670541#(< i1 (* 2 N)), 1670537#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1670547#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N)))] [2022-03-15 21:19:49,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:19:49,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:19:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:19:49,014 INFO L87 Difference]: Start difference. First operand 4128 states and 11295 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:52,822 INFO L93 Difference]: Finished difference Result 6270 states and 15867 transitions. [2022-03-15 21:19:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-15 21:19:52,823 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 21:19:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:52,831 INFO L225 Difference]: With dead ends: 6270 [2022-03-15 21:19:52,831 INFO L226 Difference]: Without dead ends: 6128 [2022-03-15 21:19:52,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12996 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6082, Invalid=30590, Unknown=0, NotChecked=0, Total=36672 [2022-03-15 21:19:52,835 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 400 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:52,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 1 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:19:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2022-03-15 21:19:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 4072. [2022-03-15 21:19:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4071 states have (on average 2.7248833210513386) internal successors, (11093), 4071 states have internal predecessors, (11093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 11093 transitions. [2022-03-15 21:19:52,895 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 11093 transitions. Word has length 27 [2022-03-15 21:19:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 4072 states and 11093 transitions. [2022-03-15 21:19:52,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 11093 transitions. [2022-03-15 21:19:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:52,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:52,900 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:52,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:53,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:53,114 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:53,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:53,114 INFO L85 PathProgramCache]: Analyzing trace with hash 176102729, now seen corresponding path program 229 times [2022-03-15 21:19:53,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:53,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645120271] [2022-03-15 21:19:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:53,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:53,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:53,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645120271] [2022-03-15 21:19:53,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645120271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:53,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996317453] [2022-03-15 21:19:53,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:19:53,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:53,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:53,170 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:53,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-15 21:19:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:53,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:53,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:53,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:19:53,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996317453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:53,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:53,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:19:53,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [913116022] [2022-03-15 21:19:53,439 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:53,441 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:53,447 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 63 transitions. [2022-03-15 21:19:53,447 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:53,655 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [1685439#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1685436#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1685441#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1685437#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1685438#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1685435#(< i2 (* 2 N)), 1685443#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1685440#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1685442#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N)))] [2022-03-15 21:19:53,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:19:53,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:19:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:19:53,656 INFO L87 Difference]: Start difference. First operand 4072 states and 11093 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 21:19:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:57,744 INFO L93 Difference]: Finished difference Result 7333 states and 17282 transitions. [2022-03-15 21:19:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-03-15 21:19:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 21:19:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:57,754 INFO L225 Difference]: With dead ends: 7333 [2022-03-15 21:19:57,754 INFO L226 Difference]: Without dead ends: 7220 [2022-03-15 21:19:57,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28402 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9923, Invalid=58983, Unknown=0, NotChecked=0, Total=68906 [2022-03-15 21:19:57,760 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 471 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:57,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:19:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7220 states. [2022-03-15 21:19:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7220 to 4227. [2022-03-15 21:19:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4227 states, 4226 states have (on average 2.7314245149077143) internal successors, (11543), 4226 states have internal predecessors, (11543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 11543 transitions. [2022-03-15 21:19:57,822 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 11543 transitions. Word has length 27 [2022-03-15 21:19:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:57,822 INFO L470 AbstractCegarLoop]: Abstraction has 4227 states and 11543 transitions. [2022-03-15 21:19:57,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 21:19:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 11543 transitions. [2022-03-15 21:19:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:57,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:57,826 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:57,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-15 21:19:58,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:58,041 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1916086717, now seen corresponding path program 230 times [2022-03-15 21:19:58,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:58,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765349975] [2022-03-15 21:19:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:58,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:58,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:58,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765349975] [2022-03-15 21:19:58,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765349975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:58,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533332398] [2022-03-15 21:19:58,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:19:58,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:58,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:58,135 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:58,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-15 21:19:58,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:19:58,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:58,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:19:58,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:58,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:58,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533332398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:58,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:58,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19] total 28 [2022-03-15 21:19:58,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1187632231] [2022-03-15 21:19:58,335 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:58,337 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:58,342 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 45 transitions. [2022-03-15 21:19:58,342 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:58,458 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [1701870#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1701873#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1701872#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 1701874#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 1701869#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1701875#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 1701871#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1701868#(< i2 (* 2 N))] [2022-03-15 21:19:58,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:19:58,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:19:58,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1000, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:19:58,459 INFO L87 Difference]: Start difference. First operand 4227 states and 11543 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 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 21:19:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:58,626 INFO L93 Difference]: Finished difference Result 4621 states and 12201 transitions. [2022-03-15 21:19:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:19:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 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 27 [2022-03-15 21:19:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:58,633 INFO L225 Difference]: With dead ends: 4621 [2022-03-15 21:19:58,633 INFO L226 Difference]: Without dead ends: 4607 [2022-03-15 21:19:58,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=781, Invalid=1871, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:19:58,634 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:58,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2022-03-15 21:19:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 4114. [2022-03-15 21:19:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 4113 states have (on average 2.7186968149769024) internal successors, (11182), 4113 states have internal predecessors, (11182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 11182 transitions. [2022-03-15 21:19:58,685 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 11182 transitions. Word has length 27 [2022-03-15 21:19:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:58,685 INFO L470 AbstractCegarLoop]: Abstraction has 4114 states and 11182 transitions. [2022-03-15 21:19:58,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 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 21:19:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 11182 transitions. [2022-03-15 21:19:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:58,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:58,690 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:58,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:58,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-15 21:19:58,903 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1565251623, now seen corresponding path program 231 times [2022-03-15 21:19:58,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:58,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597049048] [2022-03-15 21:19:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:58,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:19:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:19:59,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:19:59,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597049048] [2022-03-15 21:19:59,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597049048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:19:59,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603718777] [2022-03-15 21:19:59,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:19:59,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:19:59,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:19:59,028 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:19:59,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-15 21:19:59,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:19:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:19:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:19:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:19:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 21:19:59,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:19:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-15 21:19:59,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603718777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:19:59,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:19:59,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 4] total 29 [2022-03-15 21:19:59,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1077395252] [2022-03-15 21:19:59,351 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:19:59,353 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:19:59,357 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2022-03-15 21:19:59,357 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:19:59,503 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1714941#(< i2 (* 2 N)), 1714943#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1714947#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 1714942#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1714945#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 1714946#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1714944#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N)))] [2022-03-15 21:19:59,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:19:59,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:19:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:19:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:19:59,504 INFO L87 Difference]: Start difference. First operand 4114 states and 11182 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 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 21:19:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:19:59,695 INFO L93 Difference]: Finished difference Result 4593 states and 11996 transitions. [2022-03-15 21:19:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:19:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 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 27 [2022-03-15 21:19:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:19:59,701 INFO L225 Difference]: With dead ends: 4593 [2022-03-15 21:19:59,701 INFO L226 Difference]: Without dead ends: 4583 [2022-03-15 21:19:59,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:19:59,702 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:19:59,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:19:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2022-03-15 21:19:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 4008. [2022-03-15 21:19:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 2.707262290990766) internal successors, (10848), 4007 states have internal predecessors, (10848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:19:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 10848 transitions. [2022-03-15 21:19:59,750 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 10848 transitions. Word has length 27 [2022-03-15 21:19:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:19:59,750 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 10848 transitions. [2022-03-15 21:19:59,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 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 21:19:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 10848 transitions. [2022-03-15 21:19:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:19:59,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:19:59,754 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:19:59,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-03-15 21:19:59,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-03-15 21:19:59,970 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:19:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:19:59,970 INFO L85 PathProgramCache]: Analyzing trace with hash 846268867, now seen corresponding path program 232 times [2022-03-15 21:19:59,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:19:59,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503817626] [2022-03-15 21:19:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:19:59,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:19:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 41 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:00,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:00,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503817626] [2022-03-15 21:20:00,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503817626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:00,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895627402] [2022-03-15 21:20:00,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:20:00,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:00,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:00,029 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:00,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-15 21:20:00,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:20:00,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 41 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:00,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 41 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:00,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895627402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:00,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:00,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2022-03-15 21:20:00,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1638372915] [2022-03-15 21:20:00,218 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:00,220 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:00,224 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 41 transitions. [2022-03-15 21:20:00,224 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:00,308 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1727770#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1727768#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1727772#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1727771#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 1727767#(< i2 (* 2 N)), 1727769#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:20:00,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:20:00,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:00,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:20:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:20:00,308 INFO L87 Difference]: Start difference. First operand 4008 states and 10848 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:00,465 INFO L93 Difference]: Finished difference Result 4576 states and 11843 transitions. [2022-03-15 21:20:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:20:00,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 21:20:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:00,471 INFO L225 Difference]: With dead ends: 4576 [2022-03-15 21:20:00,471 INFO L226 Difference]: Without dead ends: 4568 [2022-03-15 21:20:00,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=621, Invalid=1359, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:20:00,471 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 49 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:00,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2022-03-15 21:20:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 3913. [2022-03-15 21:20:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.695807770961145) internal successors, (10546), 3912 states have internal predecessors, (10546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10546 transitions. [2022-03-15 21:20:00,514 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10546 transitions. Word has length 27 [2022-03-15 21:20:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:00,514 INFO L470 AbstractCegarLoop]: Abstraction has 3913 states and 10546 transitions. [2022-03-15 21:20:00,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10546 transitions. [2022-03-15 21:20:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:00,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:00,518 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:00,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:00,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-15 21:20:00,724 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:00,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:00,724 INFO L85 PathProgramCache]: Analyzing trace with hash 961623207, now seen corresponding path program 233 times [2022-03-15 21:20:00,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:00,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900290075] [2022-03-15 21:20:00,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:00,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:00,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:00,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900290075] [2022-03-15 21:20:00,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900290075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:00,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24502591] [2022-03-15 21:20:00,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:20:00,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:00,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:00,814 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:00,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-15 21:20:00,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:20:00,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:00,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:00,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:01,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24502591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:01,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:01,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 19] total 28 [2022-03-15 21:20:01,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [670622489] [2022-03-15 21:20:01,011 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:01,012 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:01,017 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2022-03-15 21:20:01,017 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:01,081 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1740385#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1740383#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1740382#(< i2 (* 2 N)), 1740384#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1740386#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:20:01,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:20:01,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:01,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:20:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:20:01,082 INFO L87 Difference]: Start difference. First operand 3913 states and 10546 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:01,199 INFO L93 Difference]: Finished difference Result 4568 states and 11727 transitions. [2022-03-15 21:20:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:20:01,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 21:20:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:01,206 INFO L225 Difference]: With dead ends: 4568 [2022-03-15 21:20:01,206 INFO L226 Difference]: Without dead ends: 4564 [2022-03-15 21:20:01,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=594, Invalid=1212, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:20:01,207 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 53 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:01,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2022-03-15 21:20:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 3830. [2022-03-15 21:20:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 2.685296422042309) internal successors, (10282), 3829 states have internal predecessors, (10282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 10282 transitions. [2022-03-15 21:20:01,251 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 10282 transitions. Word has length 27 [2022-03-15 21:20:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:01,251 INFO L470 AbstractCegarLoop]: Abstraction has 3830 states and 10282 transitions. [2022-03-15 21:20:01,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 10282 transitions. [2022-03-15 21:20:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:01,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:01,255 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:01,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-03-15 21:20:01,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-15 21:20:01,471 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:01,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1242438979, now seen corresponding path program 234 times [2022-03-15 21:20:01,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:01,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562895834] [2022-03-15 21:20:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:01,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:01,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:01,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562895834] [2022-03-15 21:20:01,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562895834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:01,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184987768] [2022-03-15 21:20:01,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:20:01,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:01,522 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:01,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-15 21:20:01,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:20:01,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:01,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:01,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 39 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:01,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184987768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:01,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:01,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 26 [2022-03-15 21:20:01,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [859444618] [2022-03-15 21:20:01,722 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:01,723 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:01,728 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2022-03-15 21:20:01,728 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:01,779 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1752819#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1752818#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1752817#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1752816#(< i2 (* 2 N))] [2022-03-15 21:20:01,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:20:01,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:01,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:20:01,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:01,779 INFO L87 Difference]: Start difference. First operand 3830 states and 10282 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:01,904 INFO L93 Difference]: Finished difference Result 4564 states and 11632 transitions. [2022-03-15 21:20:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:20:01,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 21:20:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:01,910 INFO L225 Difference]: With dead ends: 4564 [2022-03-15 21:20:01,910 INFO L226 Difference]: Without dead ends: 4561 [2022-03-15 21:20:01,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=482, Invalid=924, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:20:01,911 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:01,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2022-03-15 21:20:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3758. [2022-03-15 21:20:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3757 states have (on average 2.6750066542454087) internal successors, (10050), 3757 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 10050 transitions. [2022-03-15 21:20:01,957 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 10050 transitions. Word has length 27 [2022-03-15 21:20:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:01,958 INFO L470 AbstractCegarLoop]: Abstraction has 3758 states and 10050 transitions. [2022-03-15 21:20:01,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:01,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 10050 transitions. [2022-03-15 21:20:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:01,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:01,961 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:01,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:02,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:02,177 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:02,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash -133975769, now seen corresponding path program 235 times [2022-03-15 21:20:02,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:02,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773196765] [2022-03-15 21:20:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:02,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:02,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773196765] [2022-03-15 21:20:02,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773196765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:02,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548038636] [2022-03-15 21:20:02,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:20:02,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:02,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:02,225 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:02,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-15 21:20:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:02,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:02,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:02,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548038636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:02,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:02,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 27 [2022-03-15 21:20:02,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [91185709] [2022-03-15 21:20:02,442 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:02,444 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:02,448 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 35 transitions. [2022-03-15 21:20:02,448 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:02,481 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1765098#(< i2 (* 2 N)), 1765099#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1765100#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:20:02,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:20:02,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:20:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:02,481 INFO L87 Difference]: Start difference. First operand 3758 states and 10050 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) 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 21:20:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:02,581 INFO L93 Difference]: Finished difference Result 4531 states and 11481 transitions. [2022-03-15 21:20:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:20:02,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) 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 27 [2022-03-15 21:20:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:02,588 INFO L225 Difference]: With dead ends: 4531 [2022-03-15 21:20:02,588 INFO L226 Difference]: Without dead ends: 4531 [2022-03-15 21:20:02,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:20:02,588 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 67 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:02,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2022-03-15 21:20:02,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 3764. [2022-03-15 21:20:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 2.6755248471963857) internal successors, (10068), 3763 states have internal predecessors, (10068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 10068 transitions. [2022-03-15 21:20:02,634 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 10068 transitions. Word has length 27 [2022-03-15 21:20:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:02,634 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 10068 transitions. [2022-03-15 21:20:02,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) 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 21:20:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 10068 transitions. [2022-03-15 21:20:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:02,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:02,638 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:02,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-03-15 21:20:02,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-03-15 21:20:02,843 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash -455470909, now seen corresponding path program 236 times [2022-03-15 21:20:02,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:02,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787293191] [2022-03-15 21:20:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:02,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:02,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:02,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787293191] [2022-03-15 21:20:02,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787293191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:02,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449023632] [2022-03-15 21:20:02,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:20:02,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:02,912 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:02,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-15 21:20:02,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:20:02,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:02,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:02,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:02,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:03,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449023632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:03,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:03,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 25 [2022-03-15 21:20:03,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1789707260] [2022-03-15 21:20:03,154 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:03,156 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:03,160 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2022-03-15 21:20:03,160 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:03,177 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1777353#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1777352#(< i2 (* 2 N))] [2022-03-15 21:20:03,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:20:03,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:03,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:20:03,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:20:03,178 INFO L87 Difference]: Start difference. First operand 3764 states and 10068 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) 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 21:20:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:03,271 INFO L93 Difference]: Finished difference Result 4950 states and 12313 transitions. [2022-03-15 21:20:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:20:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 27 [2022-03-15 21:20:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:03,277 INFO L225 Difference]: With dead ends: 4950 [2022-03-15 21:20:03,278 INFO L226 Difference]: Without dead ends: 4950 [2022-03-15 21:20:03,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:03,278 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 103 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:03,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-03-15 21:20:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3811. [2022-03-15 21:20:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 2.687926509186352) internal successors, (10241), 3810 states have internal predecessors, (10241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 10241 transitions. [2022-03-15 21:20:03,327 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 10241 transitions. Word has length 27 [2022-03-15 21:20:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:03,327 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 10241 transitions. [2022-03-15 21:20:03,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) 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 21:20:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 10241 transitions. [2022-03-15 21:20:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:03,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:03,331 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:03,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:03,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-03-15 21:20:03,543 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2071441532, now seen corresponding path program 237 times [2022-03-15 21:20:03,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:03,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780689633] [2022-03-15 21:20:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:03,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 48 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:20:03,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:03,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780689633] [2022-03-15 21:20:03,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780689633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:03,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391043223] [2022-03-15 21:20:03,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:20:03,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:03,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:03,640 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:03,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-15 21:20:03,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:20:03,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:03,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 47 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:03,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 47 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:03,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391043223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:03,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:03,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 21] total 32 [2022-03-15 21:20:03,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [779775740] [2022-03-15 21:20:03,943 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:03,945 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:03,951 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 71 transitions. [2022-03-15 21:20:03,951 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:04,406 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [1790125#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1790139#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 1790130#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1790133#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1790135#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 1790126#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1790127#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1790128#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 1790137#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1790129#(< i1 (* 2 N)), 1790134#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 1790132#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 1790124#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1790138#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 1790131#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1790136#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1790123#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1790066#(<= (* 2 N) (+ 7 i2)), 1790121#(< i2 (* 2 N)), 1790122#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:20:04,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 21:20:04,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 21:20:04,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=2126, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:20:04,407 INFO L87 Difference]: Start difference. First operand 3811 states and 10241 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:07,626 INFO L93 Difference]: Finished difference Result 5977 states and 14833 transitions. [2022-03-15 21:20:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-03-15 21:20:07,626 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 21:20:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:07,633 INFO L225 Difference]: With dead ends: 5977 [2022-03-15 21:20:07,633 INFO L226 Difference]: Without dead ends: 5791 [2022-03-15 21:20:07,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13808 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6475, Invalid=33325, Unknown=0, NotChecked=0, Total=39800 [2022-03-15 21:20:07,635 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 508 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:07,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:20:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5791 states. [2022-03-15 21:20:07,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 3757. [2022-03-15 21:20:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3757 states, 3756 states have (on average 2.671192758253461) internal successors, (10033), 3756 states have internal predecessors, (10033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 10033 transitions. [2022-03-15 21:20:07,687 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 10033 transitions. Word has length 27 [2022-03-15 21:20:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:07,687 INFO L470 AbstractCegarLoop]: Abstraction has 3757 states and 10033 transitions. [2022-03-15 21:20:07,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:07,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 10033 transitions. [2022-03-15 21:20:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:07,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:07,691 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:07,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:07,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-15 21:20:07,907 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:07,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:07,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1574220377, now seen corresponding path program 238 times [2022-03-15 21:20:07,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:07,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016627857] [2022-03-15 21:20:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:07,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:07,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:07,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016627857] [2022-03-15 21:20:07,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016627857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:07,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209308041] [2022-03-15 21:20:07,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:20:07,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:07,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:07,980 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:07,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-15 21:20:08,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:20:08,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:08,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:08,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:08,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209308041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:08,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:08,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:20:08,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1200118436] [2022-03-15 21:20:08,241 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:08,243 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:08,249 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 67 transitions. [2022-03-15 21:20:08,249 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:08,481 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [1804111#(< i2 (* 2 N)), 1804112#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1804116#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1804113#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1804119#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1804115#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1804117#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1804120#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 1804114#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1804118#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N)))] [2022-03-15 21:20:08,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:20:08,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:20:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:20:08,483 INFO L87 Difference]: Start difference. First operand 3757 states and 10033 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 21:20:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:15,709 INFO L93 Difference]: Finished difference Result 8744 states and 19629 transitions. [2022-03-15 21:20:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 338 states. [2022-03-15 21:20:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 21:20:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:15,719 INFO L225 Difference]: With dead ends: 8744 [2022-03-15 21:20:15,719 INFO L226 Difference]: Without dead ends: 8744 [2022-03-15 21:20:15,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57196 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17039, Invalid=114367, Unknown=0, NotChecked=0, Total=131406 [2022-03-15 21:20:15,723 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 706 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:15,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 1 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:20:15,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2022-03-15 21:20:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 3951. [2022-03-15 21:20:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 2.6769620253164557) internal successors, (10574), 3950 states have internal predecessors, (10574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 10574 transitions. [2022-03-15 21:20:15,783 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 10574 transitions. Word has length 27 [2022-03-15 21:20:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:15,783 INFO L470 AbstractCegarLoop]: Abstraction has 3951 states and 10574 transitions. [2022-03-15 21:20:15,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 21:20:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 10574 transitions. [2022-03-15 21:20:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:15,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:15,787 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:15,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:16,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:16,002 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1151621623, now seen corresponding path program 239 times [2022-03-15 21:20:16,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:16,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724164852] [2022-03-15 21:20:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:16,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:16,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:16,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724164852] [2022-03-15 21:20:16,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724164852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:16,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111081181] [2022-03-15 21:20:16,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:20:16,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:16,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:16,115 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:16,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-15 21:20:16,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:20:16,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:16,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:16,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:16,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111081181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:16,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:16,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 31 [2022-03-15 21:20:16,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1321308240] [2022-03-15 21:20:16,388 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:16,389 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:16,394 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:20:16,394 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:16,582 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [1821606#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1821612#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 1821611#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 1821609#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 1821613#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 1821610#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1821605#(< i2 (* 2 N)), 1821608#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1821607#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:20:16,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:20:16,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:16,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:20:16,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:20:16,582 INFO L87 Difference]: Start difference. First operand 3951 states and 10574 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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 21:20:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:16,824 INFO L93 Difference]: Finished difference Result 4376 states and 11199 transitions. [2022-03-15 21:20:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:20:16,825 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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 27 [2022-03-15 21:20:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:16,831 INFO L225 Difference]: With dead ends: 4376 [2022-03-15 21:20:16,831 INFO L226 Difference]: Without dead ends: 4376 [2022-03-15 21:20:16,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=964, Invalid=2342, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:20:16,831 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 91 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:16,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2022-03-15 21:20:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3954. [2022-03-15 21:20:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.664305590690615) internal successors, (10532), 3953 states have internal predecessors, (10532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 10532 transitions. [2022-03-15 21:20:16,878 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 10532 transitions. Word has length 27 [2022-03-15 21:20:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:16,878 INFO L470 AbstractCegarLoop]: Abstraction has 3954 states and 10532 transitions. [2022-03-15 21:20:16,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 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 21:20:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 10532 transitions. [2022-03-15 21:20:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:16,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:16,882 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:16,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:17,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:17,095 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash 407831043, now seen corresponding path program 240 times [2022-03-15 21:20:17,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:17,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672045775] [2022-03-15 21:20:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:17,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:17,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672045775] [2022-03-15 21:20:17,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672045775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:17,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988946424] [2022-03-15 21:20:17,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:20:17,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:17,212 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:17,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-15 21:20:17,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:20:17,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:17,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:17,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:17,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988946424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:17,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:17,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 30 [2022-03-15 21:20:17,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [49305017] [2022-03-15 21:20:17,499 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:17,500 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:17,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:20:17,505 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:17,656 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [1834121#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1834120#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1834124#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1834125#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 1834119#(< i2 (* 2 N)), 1834122#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1834126#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 1834123#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:20:17,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:20:17,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:20:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:20:17,657 INFO L87 Difference]: Start difference. First operand 3954 states and 10532 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 21:20:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:17,918 INFO L93 Difference]: Finished difference Result 4526 states and 11416 transitions. [2022-03-15 21:20:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:20:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 27 [2022-03-15 21:20:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:17,923 INFO L225 Difference]: With dead ends: 4526 [2022-03-15 21:20:17,923 INFO L226 Difference]: Without dead ends: 4526 [2022-03-15 21:20:17,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=854, Invalid=2008, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:20:17,924 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 78 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:17,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4526 states. [2022-03-15 21:20:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4526 to 3954. [2022-03-15 21:20:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.65545155578042) internal successors, (10497), 3953 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 10497 transitions. [2022-03-15 21:20:17,970 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 10497 transitions. Word has length 27 [2022-03-15 21:20:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:17,970 INFO L470 AbstractCegarLoop]: Abstraction has 3954 states and 10497 transitions. [2022-03-15 21:20:17,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 21:20:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 10497 transitions. [2022-03-15 21:20:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:17,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:17,974 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:17,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-03-15 21:20:18,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2022-03-15 21:20:18,187 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1843609289, now seen corresponding path program 241 times [2022-03-15 21:20:18,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:18,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898596984] [2022-03-15 21:20:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:18,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:18,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898596984] [2022-03-15 21:20:18,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898596984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:18,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735636473] [2022-03-15 21:20:18,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:20:18,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:18,303 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:18,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-15 21:20:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:18,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:18,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:18,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735636473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:18,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:18,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 20] total 30 [2022-03-15 21:20:18,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1791217636] [2022-03-15 21:20:18,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:18,592 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:18,598 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:20:18,598 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:18,772 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1846778#(< i2 (* 2 N)), 1846781#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1846784#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 1846779#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1846780#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1846783#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1846782#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:20:18,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:20:18,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:20:18,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:20:18,772 INFO L87 Difference]: Start difference. First operand 3954 states and 10497 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:19,031 INFO L93 Difference]: Finished difference Result 4700 states and 11709 transitions. [2022-03-15 21:20:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:20:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 21:20:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:19,037 INFO L225 Difference]: With dead ends: 4700 [2022-03-15 21:20:19,037 INFO L226 Difference]: Without dead ends: 4700 [2022-03-15 21:20:19,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=786, Invalid=1764, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:20:19,038 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 82 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:19,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2022-03-15 21:20:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 3955. [2022-03-15 21:20:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3955 states, 3954 states have (on average 2.648710166919575) internal successors, (10473), 3954 states have internal predecessors, (10473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3955 states to 3955 states and 10473 transitions. [2022-03-15 21:20:19,086 INFO L78 Accepts]: Start accepts. Automaton has 3955 states and 10473 transitions. Word has length 27 [2022-03-15 21:20:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:19,087 INFO L470 AbstractCegarLoop]: Abstraction has 3955 states and 10473 transitions. [2022-03-15 21:20:19,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3955 states and 10473 transitions. [2022-03-15 21:20:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:19,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:19,091 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:19,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:19,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-03-15 21:20:19,299 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash 504451395, now seen corresponding path program 242 times [2022-03-15 21:20:19,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:19,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580045816] [2022-03-15 21:20:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:19,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:19,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:19,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580045816] [2022-03-15 21:20:19,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580045816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:19,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261842344] [2022-03-15 21:20:19,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:20:19,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:19,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:19,405 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:19,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-15 21:20:19,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:20:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:19,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:19,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:19,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261842344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:19,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:19,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19] total 29 [2022-03-15 21:20:19,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [950649817] [2022-03-15 21:20:19,607 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:19,608 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:19,613 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:20:19,613 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:19,737 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [1859612#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 1859609#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1859607#(< i2 (* 2 N)), 1859608#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1859610#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 1859611#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:20:19,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:20:19,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:20:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:20:19,737 INFO L87 Difference]: Start difference. First operand 3955 states and 10473 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:19,939 INFO L93 Difference]: Finished difference Result 4920 states and 12106 transitions. [2022-03-15 21:20:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:20:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 21:20:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:19,946 INFO L225 Difference]: With dead ends: 4920 [2022-03-15 21:20:19,946 INFO L226 Difference]: Without dead ends: 4920 [2022-03-15 21:20:19,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=688, Invalid=1474, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:20:19,946 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 89 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:19,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2022-03-15 21:20:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 3959. [2022-03-15 21:20:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3959 states, 3958 states have (on average 2.643254168772107) internal successors, (10462), 3958 states have internal predecessors, (10462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:20,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3959 states to 3959 states and 10462 transitions. [2022-03-15 21:20:20,016 INFO L78 Accepts]: Start accepts. Automaton has 3959 states and 10462 transitions. Word has length 27 [2022-03-15 21:20:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:20,016 INFO L470 AbstractCegarLoop]: Abstraction has 3959 states and 10462 transitions. [2022-03-15 21:20:20,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3959 states and 10462 transitions. [2022-03-15 21:20:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:20,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:20,019 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:20,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:20,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:20,236 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 184158089, now seen corresponding path program 243 times [2022-03-15 21:20:20,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:20,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085013549] [2022-03-15 21:20:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:20,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:20,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:20,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085013549] [2022-03-15 21:20:20,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085013549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:20,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087564125] [2022-03-15 21:20:20,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:20:20,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:20,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:20,338 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:20,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-15 21:20:20,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:20:20,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:20,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:20:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 21:20:20,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-15 21:20:20,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087564125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:20,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:20,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 4] total 28 [2022-03-15 21:20:20,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1821866221] [2022-03-15 21:20:20,654 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:20,656 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:20,661 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:20:20,661 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:20,825 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [1872659#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1872658#(< i2 (* 2 N)), 1872662#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 1872660#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1872661#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N)))] [2022-03-15 21:20:20,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:20:20,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:20,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:20:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:20:20,826 INFO L87 Difference]: Start difference. First operand 3959 states and 10462 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) 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 21:20:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:21,072 INFO L93 Difference]: Finished difference Result 5174 states and 12581 transitions. [2022-03-15 21:20:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:20:21,073 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 27 [2022-03-15 21:20:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:21,079 INFO L225 Difference]: With dead ends: 5174 [2022-03-15 21:20:21,079 INFO L226 Difference]: Without dead ends: 5174 [2022-03-15 21:20:21,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1474, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:20:21,080 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:21,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2022-03-15 21:20:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 3964. [2022-03-15 21:20:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3964 states, 3963 states have (on average 2.6399192530910924) internal successors, (10462), 3963 states have internal predecessors, (10462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3964 states to 3964 states and 10462 transitions. [2022-03-15 21:20:21,131 INFO L78 Accepts]: Start accepts. Automaton has 3964 states and 10462 transitions. Word has length 27 [2022-03-15 21:20:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:21,131 INFO L470 AbstractCegarLoop]: Abstraction has 3964 states and 10462 transitions. [2022-03-15 21:20:21,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 21:20:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3964 states and 10462 transitions. [2022-03-15 21:20:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:21,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:21,135 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:21,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-03-15 21:20:21,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-15 21:20:21,347 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash 312373379, now seen corresponding path program 244 times [2022-03-15 21:20:21,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:21,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351918809] [2022-03-15 21:20:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:21,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:21,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:21,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351918809] [2022-03-15 21:20:21,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351918809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:21,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271746984] [2022-03-15 21:20:21,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:20:21,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:21,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:21,419 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:21,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-15 21:20:21,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:20:21,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:21,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:21,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:21,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:21,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271746984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:21,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:21,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 28 [2022-03-15 21:20:21,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [434757083] [2022-03-15 21:20:21,670 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:21,672 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:21,677 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:20:21,677 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:21,765 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1885969#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1885968#(< i2 (* 2 N)), 1885970#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 1885971#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N)))] [2022-03-15 21:20:21,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:20:21,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:20:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=722, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:20:21,766 INFO L87 Difference]: Start difference. First operand 3964 states and 10462 transitions. Second operand has 20 states, 20 states have (on average 2.1) 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 21:20:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:21,921 INFO L93 Difference]: Finished difference Result 5467 states and 13137 transitions. [2022-03-15 21:20:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:20:21,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) 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 27 [2022-03-15 21:20:21,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:21,928 INFO L225 Difference]: With dead ends: 5467 [2022-03-15 21:20:21,929 INFO L226 Difference]: Without dead ends: 5467 [2022-03-15 21:20:21,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=543, Invalid=1017, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:20:21,929 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:21,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2022-03-15 21:20:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 3972. [2022-03-15 21:20:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 2.637874590783178) internal successors, (10475), 3971 states have internal predecessors, (10475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 10475 transitions. [2022-03-15 21:20:21,984 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 10475 transitions. Word has length 27 [2022-03-15 21:20:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:21,984 INFO L470 AbstractCegarLoop]: Abstraction has 3972 states and 10475 transitions. [2022-03-15 21:20:21,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) 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 21:20:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 10475 transitions. [2022-03-15 21:20:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:21,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:21,996 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:22,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:22,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-15 21:20:22,204 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1286340681, now seen corresponding path program 245 times [2022-03-15 21:20:22,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:22,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931013058] [2022-03-15 21:20:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:22,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:22,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:22,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931013058] [2022-03-15 21:20:22,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931013058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:22,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549465670] [2022-03-15 21:20:22,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:20:22,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:22,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:22,288 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:22,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-15 21:20:22,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:20:22,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:22,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:22,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549465670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:22,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:22,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 18] total 28 [2022-03-15 21:20:22,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [466004383] [2022-03-15 21:20:22,615 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:22,617 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:22,622 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:20:22,622 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:22,709 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1899583#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 1899582#(< i2 (* 2 N)), 1899584#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:20:22,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:20:22,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:22,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:20:22,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=648, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:20:22,709 INFO L87 Difference]: Start difference. First operand 3972 states and 10475 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 21:20:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:22,885 INFO L93 Difference]: Finished difference Result 5732 states and 13642 transitions. [2022-03-15 21:20:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:20:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 27 [2022-03-15 21:20:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:22,892 INFO L225 Difference]: With dead ends: 5732 [2022-03-15 21:20:22,892 INFO L226 Difference]: Without dead ends: 5732 [2022-03-15 21:20:22,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=493, Invalid=839, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:20:22,892 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 67 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:22,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2022-03-15 21:20:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 3983. [2022-03-15 21:20:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3983 states, 3982 states have (on average 2.637117026619789) internal successors, (10501), 3982 states have internal predecessors, (10501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3983 states to 3983 states and 10501 transitions. [2022-03-15 21:20:22,945 INFO L78 Accepts]: Start accepts. Automaton has 3983 states and 10501 transitions. Word has length 27 [2022-03-15 21:20:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:22,945 INFO L470 AbstractCegarLoop]: Abstraction has 3983 states and 10501 transitions. [2022-03-15 21:20:22,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 21:20:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3983 states and 10501 transitions. [2022-03-15 21:20:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:22,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:22,949 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:22,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:23,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-03-15 21:20:23,164 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:23,165 INFO L85 PathProgramCache]: Analyzing trace with hash -898998333, now seen corresponding path program 246 times [2022-03-15 21:20:23,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:23,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787454574] [2022-03-15 21:20:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:23,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:23,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:23,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787454574] [2022-03-15 21:20:23,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787454574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:23,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334906663] [2022-03-15 21:20:23,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:20:23,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:23,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:23,244 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:23,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-15 21:20:23,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:20:23,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:23,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:23,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:23,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334906663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:23,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:23,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 17] total 27 [2022-03-15 21:20:23,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [801974734] [2022-03-15 21:20:23,570 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:23,571 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:23,577 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2022-03-15 21:20:23,577 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:23,647 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1913477#(< i2 (* 2 N)), 1913478#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:20:23,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:20:23,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:20:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=537, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:20:23,648 INFO L87 Difference]: Start difference. First operand 3983 states and 10501 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 21:20:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:23,790 INFO L93 Difference]: Finished difference Result 5731 states and 13625 transitions. [2022-03-15 21:20:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:20:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 27 [2022-03-15 21:20:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:23,797 INFO L225 Difference]: With dead ends: 5731 [2022-03-15 21:20:23,798 INFO L226 Difference]: Without dead ends: 5731 [2022-03-15 21:20:23,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:20:23,798 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 78 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:23,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2022-03-15 21:20:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 3991. [2022-03-15 21:20:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3990 states have (on average 2.637844611528822) internal successors, (10525), 3990 states have internal predecessors, (10525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 10525 transitions. [2022-03-15 21:20:23,856 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 10525 transitions. Word has length 27 [2022-03-15 21:20:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:23,856 INFO L470 AbstractCegarLoop]: Abstraction has 3991 states and 10525 transitions. [2022-03-15 21:20:23,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 21:20:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 10525 transitions. [2022-03-15 21:20:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:23,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:23,860 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:23,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:24,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:24,075 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:24,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:24,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1379366474, now seen corresponding path program 247 times [2022-03-15 21:20:24,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:24,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791691761] [2022-03-15 21:20:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:24,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 56 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:20:24,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:24,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791691761] [2022-03-15 21:20:24,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791691761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:24,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564981630] [2022-03-15 21:20:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:20:24,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:24,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:24,204 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:24,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-15 21:20:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:24,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:20:24,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 55 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:20:24,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 55 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:20:24,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564981630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:24,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:24,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 29 [2022-03-15 21:20:24,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1802731895] [2022-03-15 21:20:24,448 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:24,450 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:24,458 INFO L252 McrAutomatonBuilder]: Finished intersection with 61 states and 93 transitions. [2022-03-15 21:20:24,458 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:25,038 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 22 new interpolants: [1927384#(< i2 (* 2 N)), 1927389#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1927395#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 1927398#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 1927403#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 1927401#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 1927390#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1927402#(<= (* 2 N) (+ i2 8)), 1927405#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 1927386#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1927399#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 1927396#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1927393#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 1927400#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 1927388#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1927391#(< i1 (* 2 N)), 1927394#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 1927387#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1927392#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 1927385#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1927397#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 1927404#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:20:25,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 21:20:25,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 21:20:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:20:25,039 INFO L87 Difference]: Start difference. First operand 3991 states and 10525 transitions. Second operand has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:30,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:30,491 INFO L93 Difference]: Finished difference Result 9193 states and 22124 transitions. [2022-03-15 21:20:30,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-03-15 21:20:30,491 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have 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 21:20:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:30,502 INFO L225 Difference]: With dead ends: 9193 [2022-03-15 21:20:30,502 INFO L226 Difference]: Without dead ends: 8768 [2022-03-15 21:20:30,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20780 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8473, Invalid=47459, Unknown=0, NotChecked=0, Total=55932 [2022-03-15 21:20:30,519 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 733 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 1249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1249 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:30,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 1 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1249 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:20:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8768 states. [2022-03-15 21:20:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8768 to 5568. [2022-03-15 21:20:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5568 states, 5567 states have (on average 2.616310400574816) internal successors, (14565), 5567 states have internal predecessors, (14565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5568 states to 5568 states and 14565 transitions. [2022-03-15 21:20:30,598 INFO L78 Accepts]: Start accepts. Automaton has 5568 states and 14565 transitions. Word has length 27 [2022-03-15 21:20:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:30,598 INFO L470 AbstractCegarLoop]: Abstraction has 5568 states and 14565 transitions. [2022-03-15 21:20:30,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5568 states and 14565 transitions. [2022-03-15 21:20:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:20:30,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:30,603 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:30,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-03-15 21:20:30,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:30,819 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash 338185, now seen corresponding path program 248 times [2022-03-15 21:20:30,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:30,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619582317] [2022-03-15 21:20:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:30,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:30,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619582317] [2022-03-15 21:20:30,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619582317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:30,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207231718] [2022-03-15 21:20:30,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:20:30,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:30,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:30,882 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:30,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-15 21:20:30,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:20:30,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:30,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:20:30,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:30,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:31,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207231718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:31,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:31,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 27 [2022-03-15 21:20:31,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [627934361] [2022-03-15 21:20:31,175 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:31,176 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:31,184 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 91 transitions. [2022-03-15 21:20:31,184 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:31,483 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [1948291#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 1948290#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 1948293#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 1948289#(< i2 (* 2 N)), 1948294#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 1948298#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 1948297#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 1948295#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 1948292#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 1948299#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 1948296#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N)))] [2022-03-15 21:20:31,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:20:31,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:20:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:20:31,484 INFO L87 Difference]: Start difference. First operand 5568 states and 14565 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:42,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:42,425 INFO L93 Difference]: Finished difference Result 11432 states and 25343 transitions. [2022-03-15 21:20:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2022-03-15 21:20:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 21:20:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:42,442 INFO L225 Difference]: With dead ends: 11432 [2022-03-15 21:20:42,442 INFO L226 Difference]: Without dead ends: 11432 [2022-03-15 21:20:42,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79944 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=22078, Invalid=159824, Unknown=0, NotChecked=0, Total=181902 [2022-03-15 21:20:42,451 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 605 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:42,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 1 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:20:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11432 states. [2022-03-15 21:20:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11432 to 5820. [2022-03-15 21:20:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5820 states, 5819 states have (on average 2.627083691355903) internal successors, (15287), 5819 states have internal predecessors, (15287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5820 states to 5820 states and 15287 transitions. [2022-03-15 21:20:42,563 INFO L78 Accepts]: Start accepts. Automaton has 5820 states and 15287 transitions. Word has length 27 [2022-03-15 21:20:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:42,563 INFO L470 AbstractCegarLoop]: Abstraction has 5820 states and 15287 transitions. [2022-03-15 21:20:42,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 5820 states and 15287 transitions. [2022-03-15 21:20:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:42,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:42,569 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:42,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:42,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:42,785 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:42,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1531738333, now seen corresponding path program 249 times [2022-03-15 21:20:42,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:42,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710834014] [2022-03-15 21:20:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:42,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:42,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:42,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710834014] [2022-03-15 21:20:42,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710834014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:42,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148437154] [2022-03-15 21:20:42,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:20:42,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:42,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:42,906 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:42,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-15 21:20:42,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:20:42,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:42,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:42,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:42,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:43,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148437154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:43,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:43,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 34 [2022-03-15 21:20:43,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1437254212] [2022-03-15 21:20:43,145 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:43,147 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:43,153 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:20:43,153 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:43,400 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [1972357#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 1972356#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 1972358#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 1972352#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 1972360#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 8))), 1972354#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 1972359#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 1972361#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 9 i1))), 1972353#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 1972351#(< i2 (* 2 N)), 1972355#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:20:43,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 21:20:43,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:43,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 21:20:43,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=1480, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:20:43,400 INFO L87 Difference]: Start difference. First operand 5820 states and 15287 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 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 21:20:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:43,805 INFO L93 Difference]: Finished difference Result 8980 states and 22634 transitions. [2022-03-15 21:20:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:20:43,805 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:20:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:43,820 INFO L225 Difference]: With dead ends: 8980 [2022-03-15 21:20:43,820 INFO L226 Difference]: Without dead ends: 8969 [2022-03-15 21:20:43,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1473, Invalid=3219, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:20:43,820 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 243 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:43,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:20:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8969 states. [2022-03-15 21:20:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8969 to 6891. [2022-03-15 21:20:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6891 states, 6890 states have (on average 2.7062409288824383) internal successors, (18646), 6890 states have internal predecessors, (18646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6891 states to 6891 states and 18646 transitions. [2022-03-15 21:20:43,929 INFO L78 Accepts]: Start accepts. Automaton has 6891 states and 18646 transitions. Word has length 29 [2022-03-15 21:20:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:43,929 INFO L470 AbstractCegarLoop]: Abstraction has 6891 states and 18646 transitions. [2022-03-15 21:20:43,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 34 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 21:20:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6891 states and 18646 transitions. [2022-03-15 21:20:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:43,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:43,935 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:43,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-03-15 21:20:44,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:44,143 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash -416733021, now seen corresponding path program 250 times [2022-03-15 21:20:44,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:44,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049919136] [2022-03-15 21:20:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:44,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:44,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049919136] [2022-03-15 21:20:44,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049919136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:44,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506125069] [2022-03-15 21:20:44,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:20:44,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:44,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:44,211 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:44,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-15 21:20:44,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:20:44,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:44,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:44,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:44,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:44,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506125069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:44,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:44,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:20:44,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2030694355] [2022-03-15 21:20:44,483 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:44,484 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:44,489 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:20:44,489 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:44,501 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1995368#(< i2 (* 2 N))] [2022-03-15 21:20:44,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:20:44,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:20:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:44,502 INFO L87 Difference]: Start difference. First operand 6891 states and 18646 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:44,690 INFO L93 Difference]: Finished difference Result 8458 states and 21397 transitions. [2022-03-15 21:20:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:20:44,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:20:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:44,703 INFO L225 Difference]: With dead ends: 8458 [2022-03-15 21:20:44,703 INFO L226 Difference]: Without dead ends: 8457 [2022-03-15 21:20:44,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=687, Invalid=1119, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:20:44,703 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 179 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:44,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8457 states. [2022-03-15 21:20:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8457 to 6931. [2022-03-15 21:20:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6931 states, 6930 states have (on average 2.7053391053391054) internal successors, (18748), 6930 states have internal predecessors, (18748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6931 states to 6931 states and 18748 transitions. [2022-03-15 21:20:44,848 INFO L78 Accepts]: Start accepts. Automaton has 6931 states and 18748 transitions. Word has length 29 [2022-03-15 21:20:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 6931 states and 18748 transitions. [2022-03-15 21:20:44,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 6931 states and 18748 transitions. [2022-03-15 21:20:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:44,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:44,854 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:44,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:45,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:45,072 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:45,073 INFO L85 PathProgramCache]: Analyzing trace with hash -915434361, now seen corresponding path program 251 times [2022-03-15 21:20:45,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:45,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309160188] [2022-03-15 21:20:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:45,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:45,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:45,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309160188] [2022-03-15 21:20:45,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309160188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:45,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512242371] [2022-03-15 21:20:45,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:20:45,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:45,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:45,154 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:45,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-15 21:20:45,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:20:45,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:45,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:45,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:45,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:45,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512242371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:45,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:45,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:20:45,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1721858070] [2022-03-15 21:20:45,398 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:45,400 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:45,405 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:20:45,405 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:45,438 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2017912#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:20:45,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:20:45,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:20:45,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:20:45,438 INFO L87 Difference]: Start difference. First operand 6931 states and 18748 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:45,623 INFO L93 Difference]: Finished difference Result 10274 states and 25086 transitions. [2022-03-15 21:20:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:20:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:20:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:45,639 INFO L225 Difference]: With dead ends: 10274 [2022-03-15 21:20:45,640 INFO L226 Difference]: Without dead ends: 10274 [2022-03-15 21:20:45,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=750, Invalid=1320, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:20:45,640 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 141 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:45,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10274 states. [2022-03-15 21:20:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10274 to 6935. [2022-03-15 21:20:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6935 states, 6934 states have (on average 2.70550908566484) internal successors, (18760), 6934 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 18760 transitions. [2022-03-15 21:20:45,783 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 18760 transitions. Word has length 29 [2022-03-15 21:20:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:45,783 INFO L470 AbstractCegarLoop]: Abstraction has 6935 states and 18760 transitions. [2022-03-15 21:20:45,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 18760 transitions. [2022-03-15 21:20:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:45,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:45,790 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:45,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:46,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:46,007 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:46,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:46,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1347724521, now seen corresponding path program 252 times [2022-03-15 21:20:46,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:46,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76919241] [2022-03-15 21:20:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:46,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:20:46,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:46,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76919241] [2022-03-15 21:20:46,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76919241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:46,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560851904] [2022-03-15 21:20:46,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:20:46,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:46,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:46,060 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:46,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-15 21:20:46,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:20:46,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:46,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:20:46,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:46,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560851904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:46,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:46,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 28 [2022-03-15 21:20:46,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [537948638] [2022-03-15 21:20:46,273 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:46,275 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:46,280 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:20:46,280 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:46,302 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2042283#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 2042282#(< i2 (* 2 N))] [2022-03-15 21:20:46,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:20:46,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:20:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=569, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:46,303 INFO L87 Difference]: Start difference. First operand 6935 states and 18760 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:46,452 INFO L93 Difference]: Finished difference Result 8356 states and 21273 transitions. [2022-03-15 21:20:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:20:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:20:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:46,466 INFO L225 Difference]: With dead ends: 8356 [2022-03-15 21:20:46,466 INFO L226 Difference]: Without dead ends: 8354 [2022-03-15 21:20:46,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=649, Invalid=1157, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:20:46,467 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 160 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:46,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2022-03-15 21:20:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 7018. [2022-03-15 21:20:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7018 states, 7017 states have (on average 2.715832977055722) internal successors, (19057), 7017 states have internal predecessors, (19057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7018 states to 7018 states and 19057 transitions. [2022-03-15 21:20:46,572 INFO L78 Accepts]: Start accepts. Automaton has 7018 states and 19057 transitions. Word has length 29 [2022-03-15 21:20:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:46,572 INFO L470 AbstractCegarLoop]: Abstraction has 7018 states and 19057 transitions. [2022-03-15 21:20:46,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7018 states and 19057 transitions. [2022-03-15 21:20:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:46,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:46,582 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:46,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-15 21:20:46,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:46,783 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:46,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1971817629, now seen corresponding path program 253 times [2022-03-15 21:20:46,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:46,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21285514] [2022-03-15 21:20:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:46,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:46,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:46,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21285514] [2022-03-15 21:20:46,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21285514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:46,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992573153] [2022-03-15 21:20:46,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:20:46,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:46,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:46,864 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:46,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-15 21:20:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:46,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:47,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992573153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:47,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:47,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:20:47,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [461849034] [2022-03-15 21:20:47,170 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:47,172 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:47,177 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:20:47,177 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:47,192 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2064898#(< i2 (* 2 N))] [2022-03-15 21:20:47,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:20:47,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:20:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:47,192 INFO L87 Difference]: Start difference. First operand 7018 states and 19057 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:47,420 INFO L93 Difference]: Finished difference Result 9163 states and 23023 transitions. [2022-03-15 21:20:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:20:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:20:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:47,434 INFO L225 Difference]: With dead ends: 9163 [2022-03-15 21:20:47,434 INFO L226 Difference]: Without dead ends: 9160 [2022-03-15 21:20:47,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:20:47,434 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 136 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:47,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2022-03-15 21:20:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 6991. [2022-03-15 21:20:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 2.701430615164521) internal successors, (18883), 6990 states have internal predecessors, (18883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 18883 transitions. [2022-03-15 21:20:47,559 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 18883 transitions. Word has length 29 [2022-03-15 21:20:47,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:47,559 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 18883 transitions. [2022-03-15 21:20:47,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 18883 transitions. [2022-03-15 21:20:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:47,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:47,566 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:47,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-03-15 21:20:47,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-15 21:20:47,768 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1824448327, now seen corresponding path program 254 times [2022-03-15 21:20:47,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:47,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647549043] [2022-03-15 21:20:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:47,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:47,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:47,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647549043] [2022-03-15 21:20:47,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647549043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:47,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146020450] [2022-03-15 21:20:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:20:47,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:47,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:47,875 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:47,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-15 21:20:47,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:20:47,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:47,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:47,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:48,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146020450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:48,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:48,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:20:48,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [208880033] [2022-03-15 21:20:48,227 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:48,228 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:48,233 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:20:48,233 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:48,276 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2088271#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:20:48,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:20:48,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:20:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:20:48,276 INFO L87 Difference]: Start difference. First operand 6991 states and 18883 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:48,500 INFO L93 Difference]: Finished difference Result 9589 states and 23502 transitions. [2022-03-15 21:20:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:20:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:20:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:48,515 INFO L225 Difference]: With dead ends: 9589 [2022-03-15 21:20:48,515 INFO L226 Difference]: Without dead ends: 9589 [2022-03-15 21:20:48,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=748, Invalid=1322, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:20:48,515 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 145 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:48,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9589 states. [2022-03-15 21:20:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9589 to 6956. [2022-03-15 21:20:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6956 states, 6955 states have (on average 2.6943206326383895) internal successors, (18739), 6955 states have internal predecessors, (18739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6956 states to 6956 states and 18739 transitions. [2022-03-15 21:20:48,626 INFO L78 Accepts]: Start accepts. Automaton has 6956 states and 18739 transitions. Word has length 29 [2022-03-15 21:20:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:48,626 INFO L470 AbstractCegarLoop]: Abstraction has 6956 states and 18739 transitions. [2022-03-15 21:20:48,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6956 states and 18739 transitions. [2022-03-15 21:20:48,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:48,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:48,633 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:48,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-03-15 21:20:48,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-15 21:20:48,849 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 969141673, now seen corresponding path program 255 times [2022-03-15 21:20:48,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:48,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290594745] [2022-03-15 21:20:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:48,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:48,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290594745] [2022-03-15 21:20:48,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290594745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:48,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623605794] [2022-03-15 21:20:48,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:20:48,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:48,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:48,955 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:48,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-15 21:20:48,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:20:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:48,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:49,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:49,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623605794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:49,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:49,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 19] total 30 [2022-03-15 21:20:49,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [386327779] [2022-03-15 21:20:49,286 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:49,287 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:49,293 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:20:49,293 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:49,358 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2112000#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2112001#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:20:49,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:20:49,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:20:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=666, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:20:49,358 INFO L87 Difference]: Start difference. First operand 6956 states and 18739 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) 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 21:20:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:49,650 INFO L93 Difference]: Finished difference Result 10325 states and 25137 transitions. [2022-03-15 21:20:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:20:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 29 [2022-03-15 21:20:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:49,666 INFO L225 Difference]: With dead ends: 10325 [2022-03-15 21:20:49,666 INFO L226 Difference]: Without dead ends: 10325 [2022-03-15 21:20:49,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=855, Invalid=1695, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:20:49,667 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 176 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:49,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 1 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10325 states. [2022-03-15 21:20:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10325 to 6967. [2022-03-15 21:20:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6967 states, 6966 states have (on average 2.6948033304622454) internal successors, (18772), 6966 states have internal predecessors, (18772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6967 states to 6967 states and 18772 transitions. [2022-03-15 21:20:49,787 INFO L78 Accepts]: Start accepts. Automaton has 6967 states and 18772 transitions. Word has length 29 [2022-03-15 21:20:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:49,787 INFO L470 AbstractCegarLoop]: Abstraction has 6967 states and 18772 transitions. [2022-03-15 21:20:49,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 21:20:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6967 states and 18772 transitions. [2022-03-15 21:20:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:49,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:49,794 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:49,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:50,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-15 21:20:50,010 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1995682887, now seen corresponding path program 256 times [2022-03-15 21:20:50,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:50,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931440064] [2022-03-15 21:20:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:50,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:20:50,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:50,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931440064] [2022-03-15 21:20:50,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931440064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:50,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483048081] [2022-03-15 21:20:50,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:20:50,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:50,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:50,081 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:50,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-15 21:20:50,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:20:50,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:50,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:20:50,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:50,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483048081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:50,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:50,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 29 [2022-03-15 21:20:50,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1014856348] [2022-03-15 21:20:50,342 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:50,344 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:50,349 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:20:50,349 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:50,378 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2136495#(< i2 (* 2 N)), 2136496#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:20:50,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:20:50,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:20:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=602, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:20:50,378 INFO L87 Difference]: Start difference. First operand 6967 states and 18772 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:50,580 INFO L93 Difference]: Finished difference Result 8834 states and 22227 transitions. [2022-03-15 21:20:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:20:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:20:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:50,594 INFO L225 Difference]: With dead ends: 8834 [2022-03-15 21:20:50,594 INFO L226 Difference]: Without dead ends: 8832 [2022-03-15 21:20:50,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=754, Invalid=1316, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:20:50,594 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 139 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:50,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8832 states. [2022-03-15 21:20:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8832 to 7047. [2022-03-15 21:20:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 2.7040874254896394) internal successors, (19053), 7046 states have internal predecessors, (19053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 19053 transitions. [2022-03-15 21:20:50,702 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 19053 transitions. Word has length 29 [2022-03-15 21:20:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:50,702 INFO L470 AbstractCegarLoop]: Abstraction has 7047 states and 19053 transitions. [2022-03-15 21:20:50,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 19053 transitions. [2022-03-15 21:20:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:50,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:50,709 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:50,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-03-15 21:20:50,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:50,911 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:50,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1360167075, now seen corresponding path program 257 times [2022-03-15 21:20:50,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:50,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111519142] [2022-03-15 21:20:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:50,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 83 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:51,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:51,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111519142] [2022-03-15 21:20:51,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111519142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:51,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146244276] [2022-03-15 21:20:51,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:20:51,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:51,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:51,036 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:51,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-15 21:20:51,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:20:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 83 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 83 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:51,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146244276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:51,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:51,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:20:51,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [751174689] [2022-03-15 21:20:51,294 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:51,296 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:51,301 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:20:51,301 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:51,313 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2159651#(< i2 (* 2 N))] [2022-03-15 21:20:51,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:20:51,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:20:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:51,314 INFO L87 Difference]: Start difference. First operand 7047 states and 19053 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:51,529 INFO L93 Difference]: Finished difference Result 9667 states and 24060 transitions. [2022-03-15 21:20:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:20:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:20:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:51,544 INFO L225 Difference]: With dead ends: 9667 [2022-03-15 21:20:51,545 INFO L226 Difference]: Without dead ends: 9663 [2022-03-15 21:20:51,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=826, Invalid=1336, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:20:51,545 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 164 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:51,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9663 states. [2022-03-15 21:20:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9663 to 7036. [2022-03-15 21:20:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 2.695095948827292) internal successors, (18960), 7035 states have internal predecessors, (18960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 18960 transitions. [2022-03-15 21:20:51,658 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 18960 transitions. Word has length 29 [2022-03-15 21:20:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:51,658 INFO L470 AbstractCegarLoop]: Abstraction has 7036 states and 18960 transitions. [2022-03-15 21:20:51,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 18960 transitions. [2022-03-15 21:20:51,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:51,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:51,665 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:51,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:51,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:51,881 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash 861465735, now seen corresponding path program 258 times [2022-03-15 21:20:51,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:51,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986750113] [2022-03-15 21:20:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:51,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:51,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986750113] [2022-03-15 21:20:51,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986750113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:51,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20731000] [2022-03-15 21:20:51,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:20:51,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:51,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:51,948 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:51,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-15 21:20:51,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 21:20:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:51,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:51,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:52,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:52,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20731000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:52,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:52,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:20:52,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2062946977] [2022-03-15 21:20:52,295 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:52,297 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:52,302 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:20:52,302 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:52,346 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2183622#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:20:52,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:20:52,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:20:52,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:20:52,347 INFO L87 Difference]: Start difference. First operand 7036 states and 18960 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:52,576 INFO L93 Difference]: Finished difference Result 10452 states and 25373 transitions. [2022-03-15 21:20:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:20:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:20:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:52,591 INFO L225 Difference]: With dead ends: 10452 [2022-03-15 21:20:52,591 INFO L226 Difference]: Without dead ends: 10448 [2022-03-15 21:20:52,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=814, Invalid=1442, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:20:52,592 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 137 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:52,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10448 states. [2022-03-15 21:20:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10448 to 6998. [2022-03-15 21:20:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 6997 states have (on average 2.6900100042875517) internal successors, (18822), 6997 states have internal predecessors, (18822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 18822 transitions. [2022-03-15 21:20:52,719 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 18822 transitions. Word has length 29 [2022-03-15 21:20:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:52,719 INFO L470 AbstractCegarLoop]: Abstraction has 6998 states and 18822 transitions. [2022-03-15 21:20:52,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 18822 transitions. [2022-03-15 21:20:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:52,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:52,726 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:52,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-15 21:20:52,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-03-15 21:20:52,939 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:52,940 INFO L85 PathProgramCache]: Analyzing trace with hash 6159081, now seen corresponding path program 259 times [2022-03-15 21:20:52,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:52,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149729051] [2022-03-15 21:20:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:52,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:53,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:53,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149729051] [2022-03-15 21:20:53,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149729051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:53,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021401272] [2022-03-15 21:20:53,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:20:53,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:53,025 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:53,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-15 21:20:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:53,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:53,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:53,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021401272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:53,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:53,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 20] total 31 [2022-03-15 21:20:53,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [361905552] [2022-03-15 21:20:53,284 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:53,285 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:53,291 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:20:53,291 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:53,357 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2208304#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2208303#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:20:53,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:20:53,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:53,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:20:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=705, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:20:53,358 INFO L87 Difference]: Start difference. First operand 6998 states and 18822 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) 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 21:20:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:53,652 INFO L93 Difference]: Finished difference Result 9459 states and 23140 transitions. [2022-03-15 21:20:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:20:53,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 29 [2022-03-15 21:20:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:53,668 INFO L225 Difference]: With dead ends: 9459 [2022-03-15 21:20:53,668 INFO L226 Difference]: Without dead ends: 9459 [2022-03-15 21:20:53,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=881, Invalid=1771, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:20:53,669 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 154 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:53,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9459 states. [2022-03-15 21:20:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9459 to 6945. [2022-03-15 21:20:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6945 states, 6944 states have (on average 2.6801555299539173) internal successors, (18611), 6944 states have internal predecessors, (18611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6945 states to 6945 states and 18611 transitions. [2022-03-15 21:20:53,782 INFO L78 Accepts]: Start accepts. Automaton has 6945 states and 18611 transitions. Word has length 29 [2022-03-15 21:20:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:53,782 INFO L470 AbstractCegarLoop]: Abstraction has 6945 states and 18611 transitions. [2022-03-15 21:20:53,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 21:20:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6945 states and 18611 transitions. [2022-03-15 21:20:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:53,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:53,789 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:53,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-03-15 21:20:53,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:53,999 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:53,999 INFO L85 PathProgramCache]: Analyzing trace with hash -738543417, now seen corresponding path program 260 times [2022-03-15 21:20:54,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:54,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304494309] [2022-03-15 21:20:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:54,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:54,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:54,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304494309] [2022-03-15 21:20:54,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304494309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:54,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695168756] [2022-03-15 21:20:54,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:20:54,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:54,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:54,105 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:54,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-15 21:20:54,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:20:54,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:54,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:54,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695168756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:54,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:54,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:20:54,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [765640213] [2022-03-15 21:20:54,382 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:54,384 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:54,389 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2022-03-15 21:20:54,389 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:54,502 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2231890#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2231892#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2231891#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:20:54,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:20:54,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:20:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:20:54,503 INFO L87 Difference]: Start difference. First operand 6945 states and 18611 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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 21:20:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:54,952 INFO L93 Difference]: Finished difference Result 10176 states and 24760 transitions. [2022-03-15 21:20:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:20:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 29 [2022-03-15 21:20:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:54,968 INFO L225 Difference]: With dead ends: 10176 [2022-03-15 21:20:54,968 INFO L226 Difference]: Without dead ends: 10176 [2022-03-15 21:20:54,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1287, Invalid=2873, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:20:54,968 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 193 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:54,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10176 states. [2022-03-15 21:20:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10176 to 6963. [2022-03-15 21:20:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6962 states have (on average 2.6808388394139615) internal successors, (18664), 6962 states have internal predecessors, (18664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 18664 transitions. [2022-03-15 21:20:55,085 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 18664 transitions. Word has length 29 [2022-03-15 21:20:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:55,086 INFO L470 AbstractCegarLoop]: Abstraction has 6963 states and 18664 transitions. [2022-03-15 21:20:55,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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 21:20:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 18664 transitions. [2022-03-15 21:20:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:55,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:55,092 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:55,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:55,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:55,308 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash 607555753, now seen corresponding path program 261 times [2022-03-15 21:20:55,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:55,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135946007] [2022-03-15 21:20:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:55,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:20:55,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:55,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135946007] [2022-03-15 21:20:55,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135946007] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:55,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395080011] [2022-03-15 21:20:55,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:20:55,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:55,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:55,403 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:55,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-15 21:20:55,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:20:55,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:55,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:55,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:20:55,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:55,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395080011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:55,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:55,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 28 [2022-03-15 21:20:55,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [663823111] [2022-03-15 21:20:55,698 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:55,700 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:55,705 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:20:55,705 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:55,734 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2256252#(< i2 (* 2 N)), 2256253#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:20:55,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:20:55,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:20:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=564, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:55,735 INFO L87 Difference]: Start difference. First operand 6963 states and 18664 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:55,951 INFO L93 Difference]: Finished difference Result 9166 states and 22842 transitions. [2022-03-15 21:20:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:20:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:20:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:55,967 INFO L225 Difference]: With dead ends: 9166 [2022-03-15 21:20:55,967 INFO L226 Difference]: Without dead ends: 9162 [2022-03-15 21:20:55,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=789, Invalid=1373, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:20:55,968 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 167 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:55,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9162 states. [2022-03-15 21:20:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9162 to 7041. [2022-03-15 21:20:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 7040 states have (on average 2.689346590909091) internal successors, (18933), 7040 states have internal predecessors, (18933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 18933 transitions. [2022-03-15 21:20:56,113 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 18933 transitions. Word has length 29 [2022-03-15 21:20:56,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:56,113 INFO L470 AbstractCegarLoop]: Abstraction has 7041 states and 18933 transitions. [2022-03-15 21:20:56,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:56,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 18933 transitions. [2022-03-15 21:20:56,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:56,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:56,118 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:56,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-15 21:20:56,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:56,331 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:56,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1572477795, now seen corresponding path program 262 times [2022-03-15 21:20:56,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:56,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447356187] [2022-03-15 21:20:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:56,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:56,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:56,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447356187] [2022-03-15 21:20:56,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447356187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:56,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415702563] [2022-03-15 21:20:56,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:20:56,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:56,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:56,395 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:56,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-15 21:20:56,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:20:56,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:56,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:56,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415702563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:56,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:56,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:20:56,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2114310873] [2022-03-15 21:20:56,654 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:56,656 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:56,661 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:20:56,661 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:56,673 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2279732#(< i2 (* 2 N))] [2022-03-15 21:20:56,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:20:56,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:56,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:20:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:20:56,673 INFO L87 Difference]: Start difference. First operand 7041 states and 18933 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:56,913 INFO L93 Difference]: Finished difference Result 9945 states and 24592 transitions. [2022-03-15 21:20:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:20:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:20:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:56,928 INFO L225 Difference]: With dead ends: 9945 [2022-03-15 21:20:56,929 INFO L226 Difference]: Without dead ends: 9941 [2022-03-15 21:20:56,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=891, Invalid=1461, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:20:56,929 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 204 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:56,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2022-03-15 21:20:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 7040. [2022-03-15 21:20:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7040 states, 7039 states have (on average 2.6836198323625515) internal successors, (18890), 7039 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7040 states to 7040 states and 18890 transitions. [2022-03-15 21:20:57,049 INFO L78 Accepts]: Start accepts. Automaton has 7040 states and 18890 transitions. Word has length 29 [2022-03-15 21:20:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:57,049 INFO L470 AbstractCegarLoop]: Abstraction has 7040 states and 18890 transitions. [2022-03-15 21:20:57,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7040 states and 18890 transitions. [2022-03-15 21:20:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:57,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:57,055 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:57,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:57,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:57,259 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1073776455, now seen corresponding path program 263 times [2022-03-15 21:20:57,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:57,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833272147] [2022-03-15 21:20:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:57,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 81 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:57,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:57,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833272147] [2022-03-15 21:20:57,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833272147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:57,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099554174] [2022-03-15 21:20:57,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:20:57,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:57,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:57,338 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:57,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-15 21:20:57,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:20:57,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 81 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:57,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:57,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099554174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:57,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:57,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:20:57,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1665793269] [2022-03-15 21:20:57,615 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:57,616 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:57,622 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:20:57,622 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:57,665 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2303993#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:20:57,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:20:57,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:20:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:20:57,666 INFO L87 Difference]: Start difference. First operand 7040 states and 18890 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:57,902 INFO L93 Difference]: Finished difference Result 11006 states and 26577 transitions. [2022-03-15 21:20:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:20:57,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:20:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:57,917 INFO L225 Difference]: With dead ends: 11006 [2022-03-15 21:20:57,918 INFO L226 Difference]: Without dead ends: 11002 [2022-03-15 21:20:57,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=842, Invalid=1510, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:20:57,918 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 149 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:57,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2022-03-15 21:20:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 7035. [2022-03-15 21:20:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7035 states, 7034 states have (on average 2.682541939152687) internal successors, (18869), 7034 states have internal predecessors, (18869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7035 states to 7035 states and 18869 transitions. [2022-03-15 21:20:58,040 INFO L78 Accepts]: Start accepts. Automaton has 7035 states and 18869 transitions. Word has length 29 [2022-03-15 21:20:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:58,041 INFO L470 AbstractCegarLoop]: Abstraction has 7035 states and 18869 transitions. [2022-03-15 21:20:58,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:20:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7035 states and 18869 transitions. [2022-03-15 21:20:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:58,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:58,047 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:58,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-03-15 21:20:58,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-15 21:20:58,263 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash 218469801, now seen corresponding path program 264 times [2022-03-15 21:20:58,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:58,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320866555] [2022-03-15 21:20:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:58,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 76 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:58,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:58,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320866555] [2022-03-15 21:20:58,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320866555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:58,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385739463] [2022-03-15 21:20:58,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:20:58,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:58,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:58,337 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:58,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-15 21:20:58,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:20:58,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:20:58,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 76 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:58,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 76 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:58,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385739463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:58,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:58,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 19] total 30 [2022-03-15 21:20:58,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [500920279] [2022-03-15 21:20:58,625 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:58,626 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:58,632 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:20:58,632 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:58,701 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2329304#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2329303#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:20:58,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:20:58,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:58,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:20:58,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=666, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:20:58,702 INFO L87 Difference]: Start difference. First operand 7035 states and 18869 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) 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 21:20:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:20:59,008 INFO L93 Difference]: Finished difference Result 10505 states and 25405 transitions. [2022-03-15 21:20:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:20:59,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 29 [2022-03-15 21:20:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:20:59,023 INFO L225 Difference]: With dead ends: 10505 [2022-03-15 21:20:59,023 INFO L226 Difference]: Without dead ends: 10499 [2022-03-15 21:20:59,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=946, Invalid=1916, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:20:59,024 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 202 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:20:59,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:20:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2022-03-15 21:20:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 7004. [2022-03-15 21:20:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 7003 states have (on average 2.6787091246608594) internal successors, (18759), 7003 states have internal predecessors, (18759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:20:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 18759 transitions. [2022-03-15 21:20:59,130 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 18759 transitions. Word has length 29 [2022-03-15 21:20:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:20:59,130 INFO L470 AbstractCegarLoop]: Abstraction has 7004 states and 18759 transitions. [2022-03-15 21:20:59,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 21:20:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 18759 transitions. [2022-03-15 21:20:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:20:59,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:20:59,136 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:20:59,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-15 21:20:59,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-15 21:20:59,339 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:20:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:20:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash -526232697, now seen corresponding path program 265 times [2022-03-15 21:20:59,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:20:59,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063732531] [2022-03-15 21:20:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:20:59,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:20:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:59,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:20:59,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063732531] [2022-03-15 21:20:59,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063732531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:20:59,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892726978] [2022-03-15 21:20:59,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:20:59,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:20:59,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:20:59,424 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:20:59,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-15 21:20:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:20:59,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:20:59,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:20:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:20:59,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:20:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:20:59,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892726978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:20:59,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:20:59,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:20:59,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [701577028] [2022-03-15 21:20:59,673 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:20:59,675 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:20:59,680 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2022-03-15 21:20:59,680 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:20:59,751 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2354062#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2354060#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2354061#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:20:59,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:20:59,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:20:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:20:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:20:59,752 INFO L87 Difference]: Start difference. First operand 7004 states and 18759 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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 21:21:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:00,095 INFO L93 Difference]: Finished difference Result 9290 states and 22711 transitions. [2022-03-15 21:21:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:21:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 29 [2022-03-15 21:21:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:00,107 INFO L225 Difference]: With dead ends: 9290 [2022-03-15 21:21:00,107 INFO L226 Difference]: Without dead ends: 9290 [2022-03-15 21:21:00,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1258, Invalid=2902, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:21:00,108 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 180 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:00,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:00,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2022-03-15 21:21:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 6961. [2022-03-15 21:21:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6960 states have (on average 2.6647988505747127) internal successors, (18547), 6960 states have internal predecessors, (18547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:00,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 18547 transitions. [2022-03-15 21:21:00,207 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 18547 transitions. Word has length 29 [2022-03-15 21:21:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:00,207 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 18547 transitions. [2022-03-15 21:21:00,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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 21:21:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 18547 transitions. [2022-03-15 21:21:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:00,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:00,213 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:00,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-15 21:21:00,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-15 21:21:00,427 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2137173655, now seen corresponding path program 266 times [2022-03-15 21:21:00,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:00,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062131180] [2022-03-15 21:21:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:00,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:00,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062131180] [2022-03-15 21:21:00,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062131180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:00,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302996116] [2022-03-15 21:21:00,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:21:00,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:00,490 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:00,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-15 21:21:00,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:21:00,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:00,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:00,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:00,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:00,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302996116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:00,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:00,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 20] total 31 [2022-03-15 21:21:00,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1628132145] [2022-03-15 21:21:00,708 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:00,710 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:00,715 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 49 transitions. [2022-03-15 21:21:00,716 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:00,807 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2377537#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2377536#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2377538#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2377535#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:00,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:21:00,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:21:00,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:21:00,808 INFO L87 Difference]: Start difference. First operand 6961 states and 18547 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:01,208 INFO L93 Difference]: Finished difference Result 9918 states and 24170 transitions. [2022-03-15 21:21:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:21:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 29 [2022-03-15 21:21:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:01,222 INFO L225 Difference]: With dead ends: 9918 [2022-03-15 21:21:01,222 INFO L226 Difference]: Without dead ends: 9918 [2022-03-15 21:21:01,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1363, Invalid=3193, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:21:01,223 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 238 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:01,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9918 states. [2022-03-15 21:21:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9918 to 6985. [2022-03-15 21:21:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 2.665807560137457) internal successors, (18618), 6984 states have internal predecessors, (18618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 18618 transitions. [2022-03-15 21:21:01,343 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 18618 transitions. Word has length 29 [2022-03-15 21:21:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:01,343 INFO L470 AbstractCegarLoop]: Abstraction has 6985 states and 18618 transitions. [2022-03-15 21:21:01,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 18618 transitions. [2022-03-15 21:21:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:01,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:01,349 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:01,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-15 21:21:01,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-15 21:21:01,554 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash 525287559, now seen corresponding path program 267 times [2022-03-15 21:21:01,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:01,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284662224] [2022-03-15 21:21:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:01,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:21:01,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:01,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284662224] [2022-03-15 21:21:01,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284662224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:01,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000056313] [2022-03-15 21:21:01,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:21:01,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:01,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:01,630 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:01,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-15 21:21:01,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:21:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:21:01,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:01,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000056313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:01,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:01,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 29 [2022-03-15 21:21:01,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1477515827] [2022-03-15 21:21:01,886 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:01,888 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:01,893 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:01,893 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:01,921 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2401690#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 2401689#(< i2 (* 2 N))] [2022-03-15 21:21:01,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:01,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:01,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:01,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=597, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:21:01,923 INFO L87 Difference]: Start difference. First operand 6985 states and 18618 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:02,149 INFO L93 Difference]: Finished difference Result 9376 states and 23211 transitions. [2022-03-15 21:21:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:21:02,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:02,163 INFO L225 Difference]: With dead ends: 9376 [2022-03-15 21:21:02,163 INFO L226 Difference]: Without dead ends: 9372 [2022-03-15 21:21:02,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=893, Invalid=1557, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:21:02,163 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 150 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:02,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-03-15 21:21:02,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 7062. [2022-03-15 21:21:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7062 states, 7061 states have (on average 2.673558985979323) internal successors, (18878), 7061 states have internal predecessors, (18878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7062 states to 7062 states and 18878 transitions. [2022-03-15 21:21:02,273 INFO L78 Accepts]: Start accepts. Automaton has 7062 states and 18878 transitions. Word has length 29 [2022-03-15 21:21:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:02,273 INFO L470 AbstractCegarLoop]: Abstraction has 7062 states and 18878 transitions. [2022-03-15 21:21:02,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7062 states and 18878 transitions. [2022-03-15 21:21:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:02,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:02,280 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:02,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:02,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-03-15 21:21:02,493 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash -435824477, now seen corresponding path program 268 times [2022-03-15 21:21:02,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:02,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545930628] [2022-03-15 21:21:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:02,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:02,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:02,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545930628] [2022-03-15 21:21:02,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545930628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:02,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562892180] [2022-03-15 21:21:02,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:21:02,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:02,573 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:02,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-15 21:21:02,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:21:02,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:02,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:02,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:02,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562892180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:02,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:02,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:21:02,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [203029717] [2022-03-15 21:21:02,821 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:02,823 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:02,828 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:21:02,828 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:02,841 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2425425#(< i2 (* 2 N))] [2022-03-15 21:21:02,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:21:02,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:21:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:21:02,841 INFO L87 Difference]: Start difference. First operand 7062 states and 18878 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:03,128 INFO L93 Difference]: Finished difference Result 10085 states and 24818 transitions. [2022-03-15 21:21:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:21:03,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:21:03,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:03,144 INFO L225 Difference]: With dead ends: 10085 [2022-03-15 21:21:03,145 INFO L226 Difference]: Without dead ends: 10081 [2022-03-15 21:21:03,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:21:03,145 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 132 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:03,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10081 states. [2022-03-15 21:21:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10081 to 7061. [2022-03-15 21:21:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7061 states, 7060 states have (on average 2.668696883852691) internal successors, (18841), 7060 states have internal predecessors, (18841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7061 states to 7061 states and 18841 transitions. [2022-03-15 21:21:03,286 INFO L78 Accepts]: Start accepts. Automaton has 7061 states and 18841 transitions. Word has length 29 [2022-03-15 21:21:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:03,286 INFO L470 AbstractCegarLoop]: Abstraction has 7061 states and 18841 transitions. [2022-03-15 21:21:03,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7061 states and 18841 transitions. [2022-03-15 21:21:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:03,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:03,292 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:03,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:03,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-03-15 21:21:03,506 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash -934525817, now seen corresponding path program 269 times [2022-03-15 21:21:03,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:03,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799131638] [2022-03-15 21:21:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:03,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 82 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:03,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:03,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799131638] [2022-03-15 21:21:03,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799131638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:03,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306205157] [2022-03-15 21:21:03,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:21:03,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:03,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:03,584 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:03,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-15 21:21:03,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:21:03,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:03,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:03,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 82 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:03,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 82 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:03,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306205157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:03,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:03,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:21:03,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1572586784] [2022-03-15 21:21:03,890 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:03,892 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:03,897 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:03,897 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:03,944 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2449872#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:03,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:03,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:21:03,945 INFO L87 Difference]: Start difference. First operand 7061 states and 18841 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:04,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:04,227 INFO L93 Difference]: Finished difference Result 11300 states and 27192 transitions. [2022-03-15 21:21:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:21:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:04,244 INFO L225 Difference]: With dead ends: 11300 [2022-03-15 21:21:04,244 INFO L226 Difference]: Without dead ends: 11296 [2022-03-15 21:21:04,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=868, Invalid=1582, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:21:04,244 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 115 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:04,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:04,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11296 states. [2022-03-15 21:21:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11296 to 7068. [2022-03-15 21:21:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 2.6690250459883966) internal successors, (18862), 7067 states have internal predecessors, (18862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 18862 transitions. [2022-03-15 21:21:04,361 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 18862 transitions. Word has length 29 [2022-03-15 21:21:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:04,361 INFO L470 AbstractCegarLoop]: Abstraction has 7068 states and 18862 transitions. [2022-03-15 21:21:04,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 18862 transitions. [2022-03-15 21:21:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:04,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:04,367 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:04,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:04,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-03-15 21:21:04,575 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1789832471, now seen corresponding path program 270 times [2022-03-15 21:21:04,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:04,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502945069] [2022-03-15 21:21:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:04,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:04,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:04,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502945069] [2022-03-15 21:21:04,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502945069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:04,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134490038] [2022-03-15 21:21:04,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:21:04,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:04,649 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:04,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-15 21:21:04,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:21:04,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:04,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:04,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:04,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:04,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134490038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:04,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:04,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 20] total 31 [2022-03-15 21:21:04,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1973629274] [2022-03-15 21:21:04,966 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:04,968 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:04,973 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:21:04,973 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:05,072 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2475546#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2475545#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:05,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:21:05,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:05,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:21:05,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=705, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:21:05,073 INFO L87 Difference]: Start difference. First operand 7068 states and 18862 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) 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 21:21:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:05,397 INFO L93 Difference]: Finished difference Result 11217 states and 26930 transitions. [2022-03-15 21:21:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:21:05,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 29 [2022-03-15 21:21:05,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:05,414 INFO L225 Difference]: With dead ends: 11217 [2022-03-15 21:21:05,414 INFO L226 Difference]: Without dead ends: 11211 [2022-03-15 21:21:05,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1045, Invalid=2147, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:21:05,415 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 155 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:05,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 1 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11211 states. [2022-03-15 21:21:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11211 to 7071. [2022-03-15 21:21:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 2.668741159830269) internal successors, (18868), 7070 states have internal predecessors, (18868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 18868 transitions. [2022-03-15 21:21:05,536 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 18868 transitions. Word has length 29 [2022-03-15 21:21:05,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:05,536 INFO L470 AbstractCegarLoop]: Abstraction has 7071 states and 18868 transitions. [2022-03-15 21:21:05,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 21:21:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 18868 transitions. [2022-03-15 21:21:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:05,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:05,543 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:05,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:05,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:05,758 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1760432327, now seen corresponding path program 271 times [2022-03-15 21:21:05,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:05,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016723956] [2022-03-15 21:21:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:05,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:05,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016723956] [2022-03-15 21:21:05,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016723956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:05,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026004303] [2022-03-15 21:21:05,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:21:05,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:05,838 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-15 21:21:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:05,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:06,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026004303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:06,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:06,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:21:06,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1834140927] [2022-03-15 21:21:06,122 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:06,123 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:06,129 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2022-03-15 21:21:06,129 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:06,230 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2501152#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2501154#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2501153#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:21:06,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:21:06,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:06,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:21:06,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:21:06,231 INFO L87 Difference]: Start difference. First operand 7071 states and 18868 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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 21:21:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:06,710 INFO L93 Difference]: Finished difference Result 10484 states and 25269 transitions. [2022-03-15 21:21:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:21:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 29 [2022-03-15 21:21:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:06,726 INFO L225 Difference]: With dead ends: 10484 [2022-03-15 21:21:06,726 INFO L226 Difference]: Without dead ends: 10476 [2022-03-15 21:21:06,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1403, Invalid=3289, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:21:06,727 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 174 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:06,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 1 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10476 states. [2022-03-15 21:21:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10476 to 7031. [2022-03-15 21:21:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7031 states, 7030 states have (on average 2.6660028449502136) internal successors, (18742), 7030 states have internal predecessors, (18742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7031 states to 7031 states and 18742 transitions. [2022-03-15 21:21:06,841 INFO L78 Accepts]: Start accepts. Automaton has 7031 states and 18742 transitions. Word has length 29 [2022-03-15 21:21:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:06,841 INFO L470 AbstractCegarLoop]: Abstraction has 7031 states and 18742 transitions. [2022-03-15 21:21:06,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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 21:21:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 7031 states and 18742 transitions. [2022-03-15 21:21:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:06,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:06,847 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:06,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:07,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:07,060 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash 149491369, now seen corresponding path program 272 times [2022-03-15 21:21:07,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:07,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340033877] [2022-03-15 21:21:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:07,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:07,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:07,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340033877] [2022-03-15 21:21:07,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340033877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:07,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566560031] [2022-03-15 21:21:07,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:21:07,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:07,160 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:07,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-15 21:21:07,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:21:07,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:07,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:07,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:07,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:07,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566560031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:07,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:07,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 21] total 32 [2022-03-15 21:21:07,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1647043541] [2022-03-15 21:21:07,497 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:07,499 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:07,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 49 transitions. [2022-03-15 21:21:07,505 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:07,639 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2525973#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2525972#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2525970#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2525971#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:21:07,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:21:07,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:21:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=920, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:21:07,639 INFO L87 Difference]: Start difference. First operand 7031 states and 18742 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:08,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:08,161 INFO L93 Difference]: Finished difference Result 9120 states and 22291 transitions. [2022-03-15 21:21:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:21:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 29 [2022-03-15 21:21:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:08,174 INFO L225 Difference]: With dead ends: 9120 [2022-03-15 21:21:08,174 INFO L226 Difference]: Without dead ends: 9120 [2022-03-15 21:21:08,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1373, Invalid=3319, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:21:08,175 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 185 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:08,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2022-03-15 21:21:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 6961. [2022-03-15 21:21:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6960 states have (on average 2.652586206896552) internal successors, (18462), 6960 states have internal predecessors, (18462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 18462 transitions. [2022-03-15 21:21:08,273 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 18462 transitions. Word has length 29 [2022-03-15 21:21:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:08,273 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 18462 transitions. [2022-03-15 21:21:08,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 18462 transitions. [2022-03-15 21:21:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:08,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:08,279 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:08,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:08,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2022-03-15 21:21:08,495 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1749929223, now seen corresponding path program 273 times [2022-03-15 21:21:08,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:08,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910548860] [2022-03-15 21:21:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:08,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:08,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910548860] [2022-03-15 21:21:08,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910548860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:08,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003776598] [2022-03-15 21:21:08,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:21:08,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:08,622 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:08,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-15 21:21:08,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 21:21:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:08,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:08,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003776598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:08,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:08,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 32 [2022-03-15 21:21:08,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [999330302] [2022-03-15 21:21:08,950 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:08,952 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:08,958 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 53 transitions. [2022-03-15 21:21:08,958 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:09,136 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [2549285#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 2549284#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2549283#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2549282#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2549281#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:09,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:21:09,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:21:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:21:09,137 INFO L87 Difference]: Start difference. First operand 6961 states and 18462 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) 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 21:21:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:10,059 INFO L93 Difference]: Finished difference Result 9586 states and 23433 transitions. [2022-03-15 21:21:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 21:21:10,059 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 29 [2022-03-15 21:21:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:10,072 INFO L225 Difference]: With dead ends: 9586 [2022-03-15 21:21:10,072 INFO L226 Difference]: Without dead ends: 9586 [2022-03-15 21:21:10,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2234, Invalid=5776, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:21:10,073 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 226 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:10,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9586 states. [2022-03-15 21:21:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9586 to 6991. [2022-03-15 21:21:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 2.653934191702432) internal successors, (18551), 6990 states have internal predecessors, (18551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 18551 transitions. [2022-03-15 21:21:10,193 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 18551 transitions. Word has length 29 [2022-03-15 21:21:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:10,193 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 18551 transitions. [2022-03-15 21:21:10,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 21:21:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 18551 transitions. [2022-03-15 21:21:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:10,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:10,200 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:10,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:10,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:10,415 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2025026455, now seen corresponding path program 274 times [2022-03-15 21:21:10,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:10,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522087891] [2022-03-15 21:21:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:21:10,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:10,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522087891] [2022-03-15 21:21:10,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522087891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:10,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978050910] [2022-03-15 21:21:10,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:21:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:10,491 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:10,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-15 21:21:10,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:21:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:10,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:10,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:21:10,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:10,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978050910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:10,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:10,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 28 [2022-03-15 21:21:10,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1346663545] [2022-03-15 21:21:10,764 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:10,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:10,771 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:10,771 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:10,795 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2573155#(< i2 (* 2 N)), 2573156#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:21:10,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:10,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=559, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:21:10,795 INFO L87 Difference]: Start difference. First operand 6991 states and 18551 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:10,983 INFO L93 Difference]: Finished difference Result 9450 states and 23297 transitions. [2022-03-15 21:21:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:21:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:10,995 INFO L225 Difference]: With dead ends: 9450 [2022-03-15 21:21:10,995 INFO L226 Difference]: Without dead ends: 9446 [2022-03-15 21:21:10,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=916, Invalid=1634, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:21:10,996 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 130 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:10,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 1 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9446 states. [2022-03-15 21:21:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9446 to 7067. [2022-03-15 21:21:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7067 states, 7066 states have (on average 2.6609114067364845) internal successors, (18802), 7066 states have internal predecessors, (18802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7067 states to 7067 states and 18802 transitions. [2022-03-15 21:21:11,095 INFO L78 Accepts]: Start accepts. Automaton has 7067 states and 18802 transitions. Word has length 29 [2022-03-15 21:21:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:11,095 INFO L470 AbstractCegarLoop]: Abstraction has 7067 states and 18802 transitions. [2022-03-15 21:21:11,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 7067 states and 18802 transitions. [2022-03-15 21:21:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:11,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:11,101 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:11,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-15 21:21:11,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:11,315 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:11,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1731314531, now seen corresponding path program 275 times [2022-03-15 21:21:11,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:11,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085847746] [2022-03-15 21:21:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 83 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:11,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:11,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085847746] [2022-03-15 21:21:11,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085847746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:11,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150032440] [2022-03-15 21:21:11,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:21:11,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:11,397 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:11,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-15 21:21:11,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:21:11,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:11,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 83 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:11,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 83 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:11,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150032440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:11,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:11,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:21:11,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [928648251] [2022-03-15 21:21:11,672 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:11,673 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:11,678 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:21:11,678 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:11,690 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2596979#(< i2 (* 2 N))] [2022-03-15 21:21:11,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:21:11,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:21:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:21:11,691 INFO L87 Difference]: Start difference. First operand 7067 states and 18802 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:11,940 INFO L93 Difference]: Finished difference Result 10060 states and 24716 transitions. [2022-03-15 21:21:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:21:11,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:21:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:11,954 INFO L225 Difference]: With dead ends: 10060 [2022-03-15 21:21:11,954 INFO L226 Difference]: Without dead ends: 10056 [2022-03-15 21:21:11,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1011, Invalid=1745, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:21:11,955 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 144 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:11,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10056 states. [2022-03-15 21:21:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10056 to 7065. [2022-03-15 21:21:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 2.6567100792751983) internal successors, (18767), 7064 states have internal predecessors, (18767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 18767 transitions. [2022-03-15 21:21:12,084 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 18767 transitions. Word has length 29 [2022-03-15 21:21:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:12,084 INFO L470 AbstractCegarLoop]: Abstraction has 7065 states and 18767 transitions. [2022-03-15 21:21:12,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 18767 transitions. [2022-03-15 21:21:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:12,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:12,091 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:12,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-03-15 21:21:12,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-15 21:21:12,303 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:12,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:12,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1232613191, now seen corresponding path program 276 times [2022-03-15 21:21:12,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:12,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453665109] [2022-03-15 21:21:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 81 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:12,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:12,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453665109] [2022-03-15 21:21:12,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453665109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:12,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251769498] [2022-03-15 21:21:12,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:21:12,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:12,400 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:12,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-15 21:21:12,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 21:21:12,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:12,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 81 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:12,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:12,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251769498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:12,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:12,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:21:12,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [278476754] [2022-03-15 21:21:12,728 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:12,730 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:12,735 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:12,735 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:12,785 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2621413#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:12,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:12,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:12,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:21:12,786 INFO L87 Difference]: Start difference. First operand 7065 states and 18767 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:13,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:13,062 INFO L93 Difference]: Finished difference Result 11295 states and 27178 transitions. [2022-03-15 21:21:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:21:13,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:13,078 INFO L225 Difference]: With dead ends: 11295 [2022-03-15 21:21:13,078 INFO L226 Difference]: Without dead ends: 11291 [2022-03-15 21:21:13,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=895, Invalid=1655, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:21:13,079 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 125 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:13,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11291 states. [2022-03-15 21:21:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11291 to 7071. [2022-03-15 21:21:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 2.657001414427157) internal successors, (18785), 7070 states have internal predecessors, (18785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 18785 transitions. [2022-03-15 21:21:13,190 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 18785 transitions. Word has length 29 [2022-03-15 21:21:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:13,190 INFO L470 AbstractCegarLoop]: Abstraction has 7071 states and 18785 transitions. [2022-03-15 21:21:13,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 18785 transitions. [2022-03-15 21:21:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:13,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:13,197 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:13,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:13,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-15 21:21:13,399 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash 377306537, now seen corresponding path program 277 times [2022-03-15 21:21:13,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:13,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272571018] [2022-03-15 21:21:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:13,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:13,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:13,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272571018] [2022-03-15 21:21:13,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272571018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:13,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936281234] [2022-03-15 21:21:13,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:21:13,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:13,471 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-15 21:21:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:13,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:13,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:13,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936281234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:13,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:13,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 19] total 30 [2022-03-15 21:21:13,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2118978357] [2022-03-15 21:21:13,743 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:13,745 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:13,750 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:21:13,750 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:13,815 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2647088#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2647089#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:21:13,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:21:13,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:13,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:21:13,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=666, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:21:13,816 INFO L87 Difference]: Start difference. First operand 7071 states and 18785 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) 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 21:21:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:14,138 INFO L93 Difference]: Finished difference Result 11533 states and 27609 transitions. [2022-03-15 21:21:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:21:14,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 29 [2022-03-15 21:21:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:14,155 INFO L225 Difference]: With dead ends: 11533 [2022-03-15 21:21:14,156 INFO L226 Difference]: Without dead ends: 11527 [2022-03-15 21:21:14,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1065, Invalid=2241, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:21:14,156 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 152 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:14,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11527 states. [2022-03-15 21:21:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11527 to 7089. [2022-03-15 21:21:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7088 states have (on average 2.657872460496614) internal successors, (18839), 7088 states have internal predecessors, (18839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 18839 transitions. [2022-03-15 21:21:14,288 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 18839 transitions. Word has length 29 [2022-03-15 21:21:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:14,288 INFO L470 AbstractCegarLoop]: Abstraction has 7089 states and 18839 transitions. [2022-03-15 21:21:14,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 21:21:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 18839 transitions. [2022-03-15 21:21:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:14,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:14,294 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:14,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-03-15 21:21:14,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-15 21:21:14,503 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash -367395961, now seen corresponding path program 278 times [2022-03-15 21:21:14,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:14,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473336692] [2022-03-15 21:21:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:14,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:14,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473336692] [2022-03-15 21:21:14,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473336692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:14,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501760038] [2022-03-15 21:21:14,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:21:14,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:14,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:14,603 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:14,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-15 21:21:14,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:21:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:14,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 75 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:14,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501760038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:14,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:14,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:21:14,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1943865522] [2022-03-15 21:21:14,874 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:14,875 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:14,881 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2022-03-15 21:21:14,881 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:14,972 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2673053#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2673051#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2673052#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:21:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:21:14,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:21:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:21:14,973 INFO L87 Difference]: Start difference. First operand 7089 states and 18839 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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 21:21:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:15,448 INFO L93 Difference]: Finished difference Result 11201 states and 26805 transitions. [2022-03-15 21:21:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:21:15,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 29 [2022-03-15 21:21:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:15,464 INFO L225 Difference]: With dead ends: 11201 [2022-03-15 21:21:15,464 INFO L226 Difference]: Without dead ends: 11193 [2022-03-15 21:21:15,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1497, Invalid=3615, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:21:15,465 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 176 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:15,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 1 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11193 states. [2022-03-15 21:21:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11193 to 7085. [2022-03-15 21:21:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 2.658102766798419) internal successors, (18830), 7084 states have internal predecessors, (18830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 18830 transitions. [2022-03-15 21:21:15,581 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 18830 transitions. Word has length 29 [2022-03-15 21:21:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:15,581 INFO L470 AbstractCegarLoop]: Abstraction has 7085 states and 18830 transitions. [2022-03-15 21:21:15,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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 21:21:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 18830 transitions. [2022-03-15 21:21:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:15,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:15,587 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:15,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:15,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-03-15 21:21:15,803 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:15,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1978336919, now seen corresponding path program 279 times [2022-03-15 21:21:15,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:15,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561788910] [2022-03-15 21:21:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:15,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:15,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561788910] [2022-03-15 21:21:15,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561788910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:15,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657443568] [2022-03-15 21:21:15,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:21:15,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:15,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:15,901 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:15,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-15 21:21:15,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:21:15,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:15,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:16,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657443568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:16,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:16,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 20] total 31 [2022-03-15 21:21:16,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [612208240] [2022-03-15 21:21:16,173 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:16,174 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:16,180 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 49 transitions. [2022-03-15 21:21:16,180 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:16,298 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2698701#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2698700#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2698702#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2698699#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:16,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:21:16,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:16,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:21:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:21:16,299 INFO L87 Difference]: Start difference. First operand 7085 states and 18830 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:16,829 INFO L93 Difference]: Finished difference Result 10306 states and 24829 transitions. [2022-03-15 21:21:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 21:21:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 29 [2022-03-15 21:21:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:16,844 INFO L225 Difference]: With dead ends: 10306 [2022-03-15 21:21:16,844 INFO L226 Difference]: Without dead ends: 10296 [2022-03-15 21:21:16,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1526, Invalid=3730, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:21:16,844 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 190 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:16,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10296 states. [2022-03-15 21:21:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10296 to 7033. [2022-03-15 21:21:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7033 states, 7032 states have (on average 2.656854379977247) internal successors, (18683), 7032 states have internal predecessors, (18683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7033 states to 7033 states and 18683 transitions. [2022-03-15 21:21:16,950 INFO L78 Accepts]: Start accepts. Automaton has 7033 states and 18683 transitions. Word has length 29 [2022-03-15 21:21:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:16,951 INFO L470 AbstractCegarLoop]: Abstraction has 7033 states and 18683 transitions. [2022-03-15 21:21:16,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 7033 states and 18683 transitions. [2022-03-15 21:21:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:16,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:16,957 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:16,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:17,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-03-15 21:21:17,172 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:17,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:17,173 INFO L85 PathProgramCache]: Analyzing trace with hash -377899065, now seen corresponding path program 280 times [2022-03-15 21:21:17,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:17,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110156441] [2022-03-15 21:21:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:17,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:17,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:17,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110156441] [2022-03-15 21:21:17,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110156441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:17,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054569631] [2022-03-15 21:21:17,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:21:17,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:17,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:17,262 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:17,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-15 21:21:17,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:21:17,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:17,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:17,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:17,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054569631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:17,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:17,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 32 [2022-03-15 21:21:17,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1764529383] [2022-03-15 21:21:17,528 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:17,530 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:17,536 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 53 transitions. [2022-03-15 21:21:17,536 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:17,706 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [2723350#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2723354#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 2723351#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2723353#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2723352#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:21:17,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:21:17,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:21:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:21:17,714 INFO L87 Difference]: Start difference. First operand 7033 states and 18683 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) 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 21:21:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:18,575 INFO L93 Difference]: Finished difference Result 8871 states and 21756 transitions. [2022-03-15 21:21:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 21:21:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 29 [2022-03-15 21:21:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:18,587 INFO L225 Difference]: With dead ends: 8871 [2022-03-15 21:21:18,587 INFO L226 Difference]: Without dead ends: 8871 [2022-03-15 21:21:18,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2127, Invalid=5705, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 21:21:18,588 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 207 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:18,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8871 states. [2022-03-15 21:21:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8871 to 6943. [2022-03-15 21:21:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6943 states, 6942 states have (on average 2.6443388072601555) internal successors, (18357), 6942 states have internal predecessors, (18357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6943 states to 6943 states and 18357 transitions. [2022-03-15 21:21:18,684 INFO L78 Accepts]: Start accepts. Automaton has 6943 states and 18357 transitions. Word has length 29 [2022-03-15 21:21:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:18,684 INFO L470 AbstractCegarLoop]: Abstraction has 6943 states and 18357 transitions. [2022-03-15 21:21:18,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 21:21:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 6943 states and 18357 transitions. [2022-03-15 21:21:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:18,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:18,690 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:18,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:18,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:18,905 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:18,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1991034153, now seen corresponding path program 281 times [2022-03-15 21:21:18,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:18,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237867634] [2022-03-15 21:21:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:18,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:18,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:18,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237867634] [2022-03-15 21:21:18,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237867634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:18,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7400428] [2022-03-15 21:21:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:21:18,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:18,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:18,978 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:18,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-15 21:21:19,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:21:19,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:19,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:19,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:19,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:19,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7400428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:19,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:19,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 32 [2022-03-15 21:21:19,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1582478726] [2022-03-15 21:21:19,209 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:19,211 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:19,217 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 57 transitions. [2022-03-15 21:21:19,217 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:19,347 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [2746416#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2746415#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2746419#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 2746420#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 2746418#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2746417#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:21:19,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:21:19,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:21:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1091, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:21:19,347 INFO L87 Difference]: Start difference. First operand 6943 states and 18357 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) 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 21:21:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:20,004 INFO L93 Difference]: Finished difference Result 9162 states and 22549 transitions. [2022-03-15 21:21:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 21:21:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) 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 29 [2022-03-15 21:21:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:20,017 INFO L225 Difference]: With dead ends: 9162 [2022-03-15 21:21:20,017 INFO L226 Difference]: Without dead ends: 9162 [2022-03-15 21:21:20,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2729 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2287, Invalid=6085, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 21:21:20,018 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 207 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:20,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9162 states. [2022-03-15 21:21:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9162 to 6979. [2022-03-15 21:21:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6979 states, 6978 states have (on average 2.646030381198051) internal successors, (18464), 6978 states have internal predecessors, (18464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6979 states to 6979 states and 18464 transitions. [2022-03-15 21:21:20,114 INFO L78 Accepts]: Start accepts. Automaton has 6979 states and 18464 transitions. Word has length 29 [2022-03-15 21:21:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:20,114 INFO L470 AbstractCegarLoop]: Abstraction has 6979 states and 18464 transitions. [2022-03-15 21:21:20,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) 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 21:21:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6979 states and 18464 transitions. [2022-03-15 21:21:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:20,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:20,120 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:20,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-15 21:21:20,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:20,336 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 519617735, now seen corresponding path program 282 times [2022-03-15 21:21:20,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:20,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609880803] [2022-03-15 21:21:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:21:20,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:20,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609880803] [2022-03-15 21:21:20,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609880803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:20,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540264903] [2022-03-15 21:21:20,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:21:20,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:20,383 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:20,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-15 21:21:20,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:21:20,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:20,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:20,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:21:20,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:20,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540264903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:20,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:20,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 29 [2022-03-15 21:21:20,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1187540842] [2022-03-15 21:21:20,600 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:20,602 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:20,607 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:20,607 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:20,627 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2769846#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 2769845#(< i2 (* 2 N))] [2022-03-15 21:21:20,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:20,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:20,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=592, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:21:20,628 INFO L87 Difference]: Start difference. First operand 6979 states and 18464 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:20,825 INFO L93 Difference]: Finished difference Result 9326 states and 23013 transitions. [2022-03-15 21:21:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:21:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:20,837 INFO L225 Difference]: With dead ends: 9326 [2022-03-15 21:21:20,837 INFO L226 Difference]: Without dead ends: 9322 [2022-03-15 21:21:20,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1020, Invalid=1842, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:21:20,838 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 120 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:20,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9322 states. [2022-03-15 21:21:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9322 to 7054. [2022-03-15 21:21:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 2.6522047355735148) internal successors, (18706), 7053 states have internal predecessors, (18706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 18706 transitions. [2022-03-15 21:21:20,961 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 18706 transitions. Word has length 29 [2022-03-15 21:21:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:20,961 INFO L470 AbstractCegarLoop]: Abstraction has 7054 states and 18706 transitions. [2022-03-15 21:21:20,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 18706 transitions. [2022-03-15 21:21:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:20,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:20,967 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:20,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:21,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2022-03-15 21:21:21,182 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:21,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:21,183 INFO L85 PathProgramCache]: Analyzing trace with hash 193147043, now seen corresponding path program 283 times [2022-03-15 21:21:21,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:21,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305571369] [2022-03-15 21:21:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:21,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:21,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305571369] [2022-03-15 21:21:21,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305571369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:21,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418241906] [2022-03-15 21:21:21,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:21:21,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:21,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:21,230 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:21,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-15 21:21:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:21,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:21,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418241906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:21,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:21,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:21:21,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [849407427] [2022-03-15 21:21:21,501 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:21,503 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:21,508 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:21:21,508 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:21,523 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2793523#(< i2 (* 2 N))] [2022-03-15 21:21:21,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:21:21,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:21,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:21:21,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:21:21,523 INFO L87 Difference]: Start difference. First operand 7054 states and 18706 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:21,845 INFO L93 Difference]: Finished difference Result 9871 states and 24279 transitions. [2022-03-15 21:21:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:21:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:21:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:21,859 INFO L225 Difference]: With dead ends: 9871 [2022-03-15 21:21:21,859 INFO L226 Difference]: Without dead ends: 9867 [2022-03-15 21:21:21,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1066, Invalid=1904, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:21:21,860 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 119 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:21,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 1 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2022-03-15 21:21:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 7052. [2022-03-15 21:21:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 2.648844135583605) internal successors, (18677), 7051 states have internal predecessors, (18677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 18677 transitions. [2022-03-15 21:21:21,958 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 18677 transitions. Word has length 29 [2022-03-15 21:21:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:21,959 INFO L470 AbstractCegarLoop]: Abstraction has 7052 states and 18677 transitions. [2022-03-15 21:21:21,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:21,959 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 18677 transitions. [2022-03-15 21:21:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:21,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:21,964 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:21,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-03-15 21:21:22,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:22,180 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash -305554297, now seen corresponding path program 284 times [2022-03-15 21:21:22,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:22,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419011885] [2022-03-15 21:21:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:22,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:22,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419011885] [2022-03-15 21:21:22,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419011885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:22,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625487274] [2022-03-15 21:21:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:21:22,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:22,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:22,256 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:22,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-15 21:21:22,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:21:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:22,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:22,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:22,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:22,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625487274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:22,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:22,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:21:22,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [338037563] [2022-03-15 21:21:22,578 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:22,579 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:22,584 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:22,584 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:22,636 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2817746#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:22,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:22,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:22,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:22,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:21:22,637 INFO L87 Difference]: Start difference. First operand 7052 states and 18677 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:22,923 INFO L93 Difference]: Finished difference Result 10997 states and 26548 transitions. [2022-03-15 21:21:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:21:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:22,941 INFO L225 Difference]: With dead ends: 10997 [2022-03-15 21:21:22,941 INFO L226 Difference]: Without dead ends: 10993 [2022-03-15 21:21:22,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=920, Invalid=1732, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:21:22,942 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 148 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:22,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10993 states. [2022-03-15 21:21:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10993 to 7052. [2022-03-15 21:21:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 2.6489859594383773) internal successors, (18678), 7051 states have internal predecessors, (18678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 18678 transitions. [2022-03-15 21:21:23,084 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 18678 transitions. Word has length 29 [2022-03-15 21:21:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:23,084 INFO L470 AbstractCegarLoop]: Abstraction has 7052 states and 18678 transitions. [2022-03-15 21:21:23,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 18678 transitions. [2022-03-15 21:21:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:23,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:23,090 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:23,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-15 21:21:23,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:23,303 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:23,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1160860951, now seen corresponding path program 285 times [2022-03-15 21:21:23,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:23,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818081194] [2022-03-15 21:21:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:23,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 76 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:23,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:23,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818081194] [2022-03-15 21:21:23,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818081194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:23,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512798599] [2022-03-15 21:21:23,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:21:23,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:23,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:23,393 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:23,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-15 21:21:23,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:21:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:23,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 76 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:23,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 76 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:23,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512798599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:23,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:23,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 20] total 31 [2022-03-15 21:21:23,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1926673465] [2022-03-15 21:21:23,718 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:23,719 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:23,725 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:21:23,725 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:23,805 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2843088#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2843089#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:21:23,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:21:23,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:23,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:21:23,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=705, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:21:23,806 INFO L87 Difference]: Start difference. First operand 7052 states and 18678 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) 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 21:21:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:24,193 INFO L93 Difference]: Finished difference Result 11414 states and 27371 transitions. [2022-03-15 21:21:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:21:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 29 [2022-03-15 21:21:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:24,209 INFO L225 Difference]: With dead ends: 11414 [2022-03-15 21:21:24,210 INFO L226 Difference]: Without dead ends: 11408 [2022-03-15 21:21:24,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1170, Invalid=2490, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:21:24,210 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 168 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:24,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11408 states. [2022-03-15 21:21:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11408 to 7065. [2022-03-15 21:21:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 2.6496319365798415) internal successors, (18717), 7064 states have internal predecessors, (18717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 18717 transitions. [2022-03-15 21:21:24,325 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 18717 transitions. Word has length 29 [2022-03-15 21:21:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:24,326 INFO L470 AbstractCegarLoop]: Abstraction has 7065 states and 18717 transitions. [2022-03-15 21:21:24,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 21:21:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 18717 transitions. [2022-03-15 21:21:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:24,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:24,332 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:24,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-15 21:21:24,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-15 21:21:24,545 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1905563449, now seen corresponding path program 286 times [2022-03-15 21:21:24,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:24,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496341238] [2022-03-15 21:21:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:24,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:24,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496341238] [2022-03-15 21:21:24,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496341238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:24,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884697440] [2022-03-15 21:21:24,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:21:24,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:24,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:24,628 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:24,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-15 21:21:24,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:21:24,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:24,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:24,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:24,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:24,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884697440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:24,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:24,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:21:24,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55428485] [2022-03-15 21:21:24,939 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:24,940 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:24,946 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2022-03-15 21:21:24,946 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:25,061 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2868890#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2868889#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2868888#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:25,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:21:25,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:21:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:21:25,062 INFO L87 Difference]: Start difference. First operand 7065 states and 18717 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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 21:21:25,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:25,565 INFO L93 Difference]: Finished difference Result 11392 states and 27228 transitions. [2022-03-15 21:21:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:21:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 29 [2022-03-15 21:21:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:25,581 INFO L225 Difference]: With dead ends: 11392 [2022-03-15 21:21:25,582 INFO L226 Difference]: Without dead ends: 11384 [2022-03-15 21:21:25,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1604, Invalid=3946, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:21:25,582 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 157 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:25,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11384 states. [2022-03-15 21:21:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11384 to 7081. [2022-03-15 21:21:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 2.650282485875706) internal successors, (18764), 7080 states have internal predecessors, (18764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 18764 transitions. [2022-03-15 21:21:25,713 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 18764 transitions. Word has length 29 [2022-03-15 21:21:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:25,713 INFO L470 AbstractCegarLoop]: Abstraction has 7081 states and 18764 transitions. [2022-03-15 21:21:25,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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 21:21:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 18764 transitions. [2022-03-15 21:21:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:25,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:25,719 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:25,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-15 21:21:25,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-15 21:21:25,921 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash 778462889, now seen corresponding path program 287 times [2022-03-15 21:21:25,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:25,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138376471] [2022-03-15 21:21:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:25,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:25,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138376471] [2022-03-15 21:21:25,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138376471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:25,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926427020] [2022-03-15 21:21:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:21:25,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:25,986 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:25,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-15 21:21:26,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:21:26,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:26,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:26,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926427020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:26,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:26,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 21] total 32 [2022-03-15 21:21:26,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [622816110] [2022-03-15 21:21:26,207 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:26,208 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:26,214 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 49 transitions. [2022-03-15 21:21:26,215 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:26,319 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2894727#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2894729#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2894728#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2894726#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:26,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:21:26,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:26,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:21:26,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=920, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:21:26,320 INFO L87 Difference]: Start difference. First operand 7081 states and 18764 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:26,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:26,786 INFO L93 Difference]: Finished difference Result 10899 states and 26102 transitions. [2022-03-15 21:21:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:21:26,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 29 [2022-03-15 21:21:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:26,802 INFO L225 Difference]: With dead ends: 10899 [2022-03-15 21:21:26,802 INFO L226 Difference]: Without dead ends: 10889 [2022-03-15 21:21:26,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1727, Invalid=4279, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:21:26,803 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 184 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:26,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10889 states. [2022-03-15 21:21:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10889 to 7076. [2022-03-15 21:21:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 2.6507420494699647) internal successors, (18754), 7075 states have internal predecessors, (18754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 18754 transitions. [2022-03-15 21:21:26,914 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 18754 transitions. Word has length 29 [2022-03-15 21:21:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:26,914 INFO L470 AbstractCegarLoop]: Abstraction has 7076 states and 18754 transitions. [2022-03-15 21:21:26,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 18754 transitions. [2022-03-15 21:21:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:26,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:26,920 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:26,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-03-15 21:21:27,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-15 21:21:27,136 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:27,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1916066553, now seen corresponding path program 288 times [2022-03-15 21:21:27,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:27,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408230972] [2022-03-15 21:21:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:27,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:27,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:27,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408230972] [2022-03-15 21:21:27,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408230972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:27,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588615151] [2022-03-15 21:21:27,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:21:27,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:27,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:27,243 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:27,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-15 21:21:27,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:21:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:27,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:27,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:27,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:27,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588615151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:27,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:27,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 32 [2022-03-15 21:21:27,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [345602393] [2022-03-15 21:21:27,547 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:27,548 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:27,554 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 53 transitions. [2022-03-15 21:21:27,554 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:27,757 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [2920066#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2920067#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2920065#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2920064#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2920068#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:21:27,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:21:27,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:27,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:21:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:21:27,758 INFO L87 Difference]: Start difference. First operand 7076 states and 18754 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) 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 21:21:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:28,498 INFO L93 Difference]: Finished difference Result 9967 states and 24092 transitions. [2022-03-15 21:21:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 21:21:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 29 [2022-03-15 21:21:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:28,514 INFO L225 Difference]: With dead ends: 9967 [2022-03-15 21:21:28,514 INFO L226 Difference]: Without dead ends: 9955 [2022-03-15 21:21:28,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2955 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2319, Invalid=6237, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 21:21:28,515 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 185 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:28,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9955 states. [2022-03-15 21:21:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9955 to 7007. [2022-03-15 21:21:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 2.653297173850985) internal successors, (18589), 7006 states have internal predecessors, (18589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 18589 transitions. [2022-03-15 21:21:28,624 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 18589 transitions. Word has length 29 [2022-03-15 21:21:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:28,624 INFO L470 AbstractCegarLoop]: Abstraction has 7007 states and 18589 transitions. [2022-03-15 21:21:28,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 21:21:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 18589 transitions. [2022-03-15 21:21:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:28,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:28,630 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:28,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:28,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:28,843 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:28,844 INFO L85 PathProgramCache]: Analyzing trace with hash 452866665, now seen corresponding path program 289 times [2022-03-15 21:21:28,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:28,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307609930] [2022-03-15 21:21:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:28,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 68 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:28,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:28,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307609930] [2022-03-15 21:21:28,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307609930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:28,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19306320] [2022-03-15 21:21:28,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:21:28,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:28,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:28,918 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:28,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-15 21:21:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:28,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 68 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:28,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 68 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:29,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19306320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:29,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:29,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22] total 33 [2022-03-15 21:21:29,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157980599] [2022-03-15 21:21:29,129 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:29,130 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:29,136 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 57 transitions. [2022-03-15 21:21:29,137 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:29,271 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [2944364#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2944366#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 2944362#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2944363#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2944365#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2944367#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:21:29,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:21:29,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:21:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:21:29,272 INFO L87 Difference]: Start difference. First operand 7007 states and 18589 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) 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 21:21:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:29,911 INFO L93 Difference]: Finished difference Result 8596 states and 21193 transitions. [2022-03-15 21:21:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 21:21:29,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) 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 29 [2022-03-15 21:21:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:29,923 INFO L225 Difference]: With dead ends: 8596 [2022-03-15 21:21:29,923 INFO L226 Difference]: Without dead ends: 8596 [2022-03-15 21:21:29,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2191, Invalid=5999, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 21:21:29,924 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 186 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:29,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2022-03-15 21:21:30,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 6893. [2022-03-15 21:21:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6893 states, 6892 states have (on average 2.641758560650029) internal successors, (18207), 6892 states have internal predecessors, (18207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6893 states to 6893 states and 18207 transitions. [2022-03-15 21:21:30,038 INFO L78 Accepts]: Start accepts. Automaton has 6893 states and 18207 transitions. Word has length 29 [2022-03-15 21:21:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:30,039 INFO L470 AbstractCegarLoop]: Abstraction has 6893 states and 18207 transitions. [2022-03-15 21:21:30,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) 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 21:21:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 6893 states and 18207 transitions. [2022-03-15 21:21:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:30,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:30,045 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:30,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:30,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2022-03-15 21:21:30,260 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash 875352391, now seen corresponding path program 290 times [2022-03-15 21:21:30,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:30,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515461077] [2022-03-15 21:21:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:30,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:30,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515461077] [2022-03-15 21:21:30,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515461077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:30,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775746726] [2022-03-15 21:21:30,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:21:30,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:30,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:30,339 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:30,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-15 21:21:30,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:21:30,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:30,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:30,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775746726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:30,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:30,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 33 [2022-03-15 21:21:30,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2135702374] [2022-03-15 21:21:30,551 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:30,552 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:30,559 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 61 transitions. [2022-03-15 21:21:30,559 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:30,713 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [2967054#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 2967055#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 2967057#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 2967056#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 2967059#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 2967060#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 2967058#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:21:30,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:21:30,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:30,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:21:30,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:21:30,714 INFO L87 Difference]: Start difference. First operand 6893 states and 18207 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) 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 21:21:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:31,695 INFO L93 Difference]: Finished difference Result 8784 states and 21766 transitions. [2022-03-15 21:21:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 21:21:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) 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 29 [2022-03-15 21:21:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:31,707 INFO L225 Difference]: With dead ends: 8784 [2022-03-15 21:21:31,707 INFO L226 Difference]: Without dead ends: 8784 [2022-03-15 21:21:31,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4461 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3454, Invalid=9656, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 21:21:31,709 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 250 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:31,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 1 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8784 states. [2022-03-15 21:21:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8784 to 6935. [2022-03-15 21:21:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6935 states, 6934 states have (on average 2.6437842515142775) internal successors, (18332), 6934 states have internal predecessors, (18332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 18332 transitions. [2022-03-15 21:21:31,808 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 18332 transitions. Word has length 29 [2022-03-15 21:21:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:31,808 INFO L470 AbstractCegarLoop]: Abstraction has 6935 states and 18332 transitions. [2022-03-15 21:21:31,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) 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 21:21:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 18332 transitions. [2022-03-15 21:21:31,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:31,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:31,815 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:31,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:32,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:32,030 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:32,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2094176297, now seen corresponding path program 291 times [2022-03-15 21:21:32,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:32,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572531617] [2022-03-15 21:21:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:32,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:21:32,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:32,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572531617] [2022-03-15 21:21:32,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572531617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:32,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321413092] [2022-03-15 21:21:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:21:32,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:32,079 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:32,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-15 21:21:32,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:21:32,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:32,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:21:32,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:32,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321413092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:32,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:32,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 28 [2022-03-15 21:21:32,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342298411] [2022-03-15 21:21:32,302 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:32,303 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:32,308 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:32,308 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:32,329 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2990060#(< i2 (* 2 N)), 2990061#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:21:32,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:32,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:32,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:32,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=554, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:21:32,329 INFO L87 Difference]: Start difference. First operand 6935 states and 18332 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:32,544 INFO L93 Difference]: Finished difference Result 9007 states and 22359 transitions. [2022-03-15 21:21:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:21:32,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:32,557 INFO L225 Difference]: With dead ends: 9007 [2022-03-15 21:21:32,557 INFO L226 Difference]: Without dead ends: 9003 [2022-03-15 21:21:32,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1031, Invalid=1939, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:21:32,558 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 104 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:32,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9003 states. [2022-03-15 21:21:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9003 to 6790. [2022-03-15 21:21:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6790 states, 6789 states have (on average 2.6341140079540435) internal successors, (17883), 6789 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6790 states to 6790 states and 17883 transitions. [2022-03-15 21:21:32,659 INFO L78 Accepts]: Start accepts. Automaton has 6790 states and 17883 transitions. Word has length 29 [2022-03-15 21:21:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:32,659 INFO L470 AbstractCegarLoop]: Abstraction has 6790 states and 17883 transitions. [2022-03-15 21:21:32,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 6790 states and 17883 transitions. [2022-03-15 21:21:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:32,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:32,665 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:32,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-15 21:21:32,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:32,876 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash -245404829, now seen corresponding path program 292 times [2022-03-15 21:21:32,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:32,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593808413] [2022-03-15 21:21:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:32,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:32,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593808413] [2022-03-15 21:21:32,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593808413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:32,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909567241] [2022-03-15 21:21:32,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:21:32,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:32,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:32,950 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:32,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-15 21:21:32,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:21:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:32,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:33,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:33,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909567241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:33,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:33,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:21:33,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [25541837] [2022-03-15 21:21:33,180 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:33,182 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:33,187 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:21:33,187 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:33,199 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3012895#(< i2 (* 2 N))] [2022-03-15 21:21:33,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:21:33,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:33,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:21:33,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:21:33,200 INFO L87 Difference]: Start difference. First operand 6790 states and 17883 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:33,496 INFO L93 Difference]: Finished difference Result 9153 states and 22436 transitions. [2022-03-15 21:21:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:21:33,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:21:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:33,509 INFO L225 Difference]: With dead ends: 9153 [2022-03-15 21:21:33,509 INFO L226 Difference]: Without dead ends: 9149 [2022-03-15 21:21:33,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1119, Invalid=2073, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:21:33,510 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 104 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:33,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9149 states. [2022-03-15 21:21:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9149 to 6788. [2022-03-15 21:21:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6788 states, 6787 states have (on average 2.6322381022543095) internal successors, (17865), 6787 states have internal predecessors, (17865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6788 states to 6788 states and 17865 transitions. [2022-03-15 21:21:33,609 INFO L78 Accepts]: Start accepts. Automaton has 6788 states and 17865 transitions. Word has length 29 [2022-03-15 21:21:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:33,609 INFO L470 AbstractCegarLoop]: Abstraction has 6788 states and 17865 transitions. [2022-03-15 21:21:33,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6788 states and 17865 transitions. [2022-03-15 21:21:33,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:33,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:33,615 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:33,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:33,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:33,831 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -744106169, now seen corresponding path program 293 times [2022-03-15 21:21:33,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:33,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728717397] [2022-03-15 21:21:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:33,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:33,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:33,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728717397] [2022-03-15 21:21:33,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728717397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:33,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318939258] [2022-03-15 21:21:33,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:21:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:33,902 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:33,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-15 21:21:33,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:21:33,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:33,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:33,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:34,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318939258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:34,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:34,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:21:34,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [320801794] [2022-03-15 21:21:34,234 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:34,236 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:34,262 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:34,262 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:34,313 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3035876#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:34,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:34,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:21:34,314 INFO L87 Difference]: Start difference. First operand 6788 states and 17865 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:34,604 INFO L93 Difference]: Finished difference Result 9977 states and 24033 transitions. [2022-03-15 21:21:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:21:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:34,618 INFO L225 Difference]: With dead ends: 9977 [2022-03-15 21:21:34,618 INFO L226 Difference]: Without dead ends: 9973 [2022-03-15 21:21:34,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=946, Invalid=1810, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:21:34,618 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 135 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:34,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 1 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9973 states. [2022-03-15 21:21:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 6791. [2022-03-15 21:21:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6791 states, 6790 states have (on average 2.6321060382916053) internal successors, (17872), 6790 states have internal predecessors, (17872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6791 states to 6791 states and 17872 transitions. [2022-03-15 21:21:34,721 INFO L78 Accepts]: Start accepts. Automaton has 6791 states and 17872 transitions. Word has length 29 [2022-03-15 21:21:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:34,721 INFO L470 AbstractCegarLoop]: Abstraction has 6791 states and 17872 transitions. [2022-03-15 21:21:34,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6791 states and 17872 transitions. [2022-03-15 21:21:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:34,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:34,727 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:34,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:34,931 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1599412823, now seen corresponding path program 294 times [2022-03-15 21:21:34,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:34,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632818296] [2022-03-15 21:21:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:34,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:35,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:35,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632818296] [2022-03-15 21:21:35,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632818296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:35,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344460301] [2022-03-15 21:21:35,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:21:35,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:35,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:35,022 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:35,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-15 21:21:35,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:21:35,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:35,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:35,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:35,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:35,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344460301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:35,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:35,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 19] total 30 [2022-03-15 21:21:35,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1564765086] [2022-03-15 21:21:35,315 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:35,317 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:35,322 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:21:35,322 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:35,389 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3059678#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3059677#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:21:35,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:21:35,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:35,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:21:35,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=666, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:21:35,389 INFO L87 Difference]: Start difference. First operand 6791 states and 17872 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) 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 21:21:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:35,731 INFO L93 Difference]: Finished difference Result 10411 states and 24861 transitions. [2022-03-15 21:21:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:21:35,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 29 [2022-03-15 21:21:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:35,746 INFO L225 Difference]: With dead ends: 10411 [2022-03-15 21:21:35,746 INFO L226 Difference]: Without dead ends: 10405 [2022-03-15 21:21:35,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1184, Invalid=2598, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:21:35,747 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 145 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:35,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2022-03-15 21:21:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 6797. [2022-03-15 21:21:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6797 states, 6796 states have (on average 2.6324308416715714) internal successors, (17890), 6796 states have internal predecessors, (17890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6797 states to 6797 states and 17890 transitions. [2022-03-15 21:21:35,859 INFO L78 Accepts]: Start accepts. Automaton has 6797 states and 17890 transitions. Word has length 29 [2022-03-15 21:21:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:35,859 INFO L470 AbstractCegarLoop]: Abstraction has 6797 states and 17890 transitions. [2022-03-15 21:21:35,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 21:21:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6797 states and 17890 transitions. [2022-03-15 21:21:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:35,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:35,865 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:35,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:36,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:36,081 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:36,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1950851975, now seen corresponding path program 295 times [2022-03-15 21:21:36,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:36,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844065749] [2022-03-15 21:21:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:36,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:36,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:36,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844065749] [2022-03-15 21:21:36,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844065749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:36,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076458135] [2022-03-15 21:21:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:21:36,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:36,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:36,163 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:36,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-15 21:21:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:36,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:36,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076458135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:36,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:36,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:21:36,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1613838826] [2022-03-15 21:21:36,470 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:36,472 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:36,498 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2022-03-15 21:21:36,498 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:36,615 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3083942#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3083943#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3083944#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:21:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:21:36,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:21:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:21:36,616 INFO L87 Difference]: Start difference. First operand 6797 states and 17890 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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 21:21:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:37,238 INFO L93 Difference]: Finished difference Result 10538 states and 25032 transitions. [2022-03-15 21:21:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 21:21:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 29 [2022-03-15 21:21:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:37,253 INFO L225 Difference]: With dead ends: 10538 [2022-03-15 21:21:37,253 INFO L226 Difference]: Without dead ends: 10530 [2022-03-15 21:21:37,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1665, Invalid=4187, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:21:37,254 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 157 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:37,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10530 states. [2022-03-15 21:21:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10530 to 6805. [2022-03-15 21:21:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6805 states, 6804 states have (on average 2.632716049382716) internal successors, (17913), 6804 states have internal predecessors, (17913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6805 states to 6805 states and 17913 transitions. [2022-03-15 21:21:37,364 INFO L78 Accepts]: Start accepts. Automaton has 6805 states and 17913 transitions. Word has length 29 [2022-03-15 21:21:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:37,364 INFO L470 AbstractCegarLoop]: Abstraction has 6805 states and 17913 transitions. [2022-03-15 21:21:37,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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 21:21:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 6805 states and 17913 transitions. [2022-03-15 21:21:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:37,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:37,370 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:37,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-03-15 21:21:37,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:37,586 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:37,586 INFO L85 PathProgramCache]: Analyzing trace with hash 339911017, now seen corresponding path program 296 times [2022-03-15 21:21:37,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:37,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521122123] [2022-03-15 21:21:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:37,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:37,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:37,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521122123] [2022-03-15 21:21:37,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521122123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:37,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366414403] [2022-03-15 21:21:37,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:21:37,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:37,684 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:37,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-15 21:21:37,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:21:37,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:37,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:37,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366414403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:37,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:37,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 20] total 31 [2022-03-15 21:21:37,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [730433425] [2022-03-15 21:21:37,924 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:37,925 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:37,931 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 49 transitions. [2022-03-15 21:21:37,931 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:38,025 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [3108377#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3108378#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3108379#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3108380#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:21:38,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:21:38,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:21:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:21:38,026 INFO L87 Difference]: Start difference. First operand 6805 states and 17913 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:38,505 INFO L93 Difference]: Finished difference Result 10361 states and 24585 transitions. [2022-03-15 21:21:38,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:21:38,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 29 [2022-03-15 21:21:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:38,520 INFO L225 Difference]: With dead ends: 10361 [2022-03-15 21:21:38,520 INFO L226 Difference]: Without dead ends: 10351 [2022-03-15 21:21:38,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1801, Invalid=4519, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:21:38,521 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 177 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:38,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2022-03-15 21:21:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 6813. [2022-03-15 21:21:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6813 states, 6812 states have (on average 2.6330005871990605) internal successors, (17936), 6812 states have internal predecessors, (17936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6813 states to 6813 states and 17936 transitions. [2022-03-15 21:21:38,670 INFO L78 Accepts]: Start accepts. Automaton has 6813 states and 17936 transitions. Word has length 29 [2022-03-15 21:21:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:38,670 INFO L470 AbstractCegarLoop]: Abstraction has 6813 states and 17936 transitions. [2022-03-15 21:21:38,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 21:21:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 6813 states and 17936 transitions. [2022-03-15 21:21:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:38,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:38,676 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:38,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:38,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-03-15 21:21:38,891 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:38,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1940348871, now seen corresponding path program 297 times [2022-03-15 21:21:38,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:38,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526691608] [2022-03-15 21:21:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:38,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:38,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526691608] [2022-03-15 21:21:38,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526691608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:38,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437211111] [2022-03-15 21:21:38,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:21:38,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:38,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:38,980 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:38,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-15 21:21:39,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:21:39,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:39,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 69 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:39,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437211111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:39,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:39,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 32 [2022-03-15 21:21:39,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [822886665] [2022-03-15 21:21:39,247 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:39,249 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:39,254 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 53 transitions. [2022-03-15 21:21:39,255 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:39,406 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [3132657#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3132661#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3132659#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3132660#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3132658#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:21:39,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:21:39,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:39,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:21:39,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:21:39,407 INFO L87 Difference]: Start difference. First operand 6813 states and 17936 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) 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 21:21:40,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:40,279 INFO L93 Difference]: Finished difference Result 9903 states and 23596 transitions. [2022-03-15 21:21:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 21:21:40,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 29 [2022-03-15 21:21:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:40,294 INFO L225 Difference]: With dead ends: 9903 [2022-03-15 21:21:40,294 INFO L226 Difference]: Without dead ends: 9891 [2022-03-15 21:21:40,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2435, Invalid=6685, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 21:21:40,296 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 196 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:40,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:40,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9891 states. [2022-03-15 21:21:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9891 to 6793. [2022-03-15 21:21:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 2.6350117785630154) internal successors, (17897), 6792 states have internal predecessors, (17897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 17897 transitions. [2022-03-15 21:21:40,399 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 17897 transitions. Word has length 29 [2022-03-15 21:21:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:40,399 INFO L470 AbstractCegarLoop]: Abstraction has 6793 states and 17897 transitions. [2022-03-15 21:21:40,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 21:21:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 17897 transitions. [2022-03-15 21:21:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:40,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:40,405 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:40,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-03-15 21:21:40,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:40,611 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash 14314793, now seen corresponding path program 298 times [2022-03-15 21:21:40,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:40,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336708442] [2022-03-15 21:21:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:40,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 68 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:40,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:40,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336708442] [2022-03-15 21:21:40,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336708442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:40,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848895298] [2022-03-15 21:21:40,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:21:40,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:40,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:40,730 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:40,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-15 21:21:40,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:21:40,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:40,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 68 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:40,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 68 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:41,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848895298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:41,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:41,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 32 [2022-03-15 21:21:41,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [896502002] [2022-03-15 21:21:41,006 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:41,008 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:41,014 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 57 transitions. [2022-03-15 21:21:41,014 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:41,201 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3156473#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3156470#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3156468#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3156472#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3156469#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3156471#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:21:41,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:21:41,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:41,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:21:41,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1091, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:21:41,201 INFO L87 Difference]: Start difference. First operand 6793 states and 17897 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) 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 21:21:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:41,959 INFO L93 Difference]: Finished difference Result 9096 states and 21966 transitions. [2022-03-15 21:21:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 21:21:41,959 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) 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 29 [2022-03-15 21:21:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:41,972 INFO L225 Difference]: With dead ends: 9096 [2022-03-15 21:21:41,972 INFO L226 Difference]: Without dead ends: 9082 [2022-03-15 21:21:41,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2395, Invalid=6535, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:21:41,973 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 202 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:41,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9082 states. [2022-03-15 21:21:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9082 to 6724. [2022-03-15 21:21:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 2.6392979324706234) internal successors, (17744), 6723 states have internal predecessors, (17744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 17744 transitions. [2022-03-15 21:21:42,070 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 17744 transitions. Word has length 29 [2022-03-15 21:21:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:42,070 INFO L470 AbstractCegarLoop]: Abstraction has 6724 states and 17744 transitions. [2022-03-15 21:21:42,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) 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 21:21:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 17744 transitions. [2022-03-15 21:21:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:42,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:42,076 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:42,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-03-15 21:21:42,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-15 21:21:42,292 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 436800519, now seen corresponding path program 299 times [2022-03-15 21:21:42,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:42,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48477549] [2022-03-15 21:21:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:42,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:42,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:42,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48477549] [2022-03-15 21:21:42,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48477549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:42,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539373400] [2022-03-15 21:21:42,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:21:42,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:42,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:42,407 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:42,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-15 21:21:42,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:21:42,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:42,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:42,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:42,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:42,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539373400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:42,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:42,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 33 [2022-03-15 21:21:42,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1166704359] [2022-03-15 21:21:42,635 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:42,637 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:42,644 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 61 transitions. [2022-03-15 21:21:42,644 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:42,835 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [3179333#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3179336#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3179337#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3179334#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3179335#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3179332#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3179338#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N)))] [2022-03-15 21:21:42,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:21:42,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:42,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:21:42,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:21:42,835 INFO L87 Difference]: Start difference. First operand 6724 states and 17744 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) 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 21:21:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:43,849 INFO L93 Difference]: Finished difference Result 8156 states and 20124 transitions. [2022-03-15 21:21:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 21:21:43,849 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) 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 29 [2022-03-15 21:21:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:43,860 INFO L225 Difference]: With dead ends: 8156 [2022-03-15 21:21:43,860 INFO L226 Difference]: Without dead ends: 8156 [2022-03-15 21:21:43,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3147, Invalid=9063, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 21:21:43,861 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 189 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:43,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:21:43,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2022-03-15 21:21:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 6661. [2022-03-15 21:21:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 2.6346846846846845) internal successors, (17547), 6660 states have internal predecessors, (17547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 17547 transitions. [2022-03-15 21:21:43,968 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 17547 transitions. Word has length 29 [2022-03-15 21:21:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:43,968 INFO L470 AbstractCegarLoop]: Abstraction has 6661 states and 17547 transitions. [2022-03-15 21:21:43,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) 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 21:21:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 17547 transitions. [2022-03-15 21:21:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:43,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:43,974 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:43,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:44,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:44,190 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash 648956137, now seen corresponding path program 300 times [2022-03-15 21:21:44,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:44,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490999881] [2022-03-15 21:21:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:44,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:44,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:44,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490999881] [2022-03-15 21:21:44,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490999881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:44,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543354422] [2022-03-15 21:21:44,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:21:44,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:44,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:44,308 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:44,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-15 21:21:44,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:21:44,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:44,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:44,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543354422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:44,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:44,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22] total 33 [2022-03-15 21:21:44,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1271530906] [2022-03-15 21:21:44,569 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:44,570 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:44,577 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 65 transitions. [2022-03-15 21:21:44,577 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:44,810 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [3201160#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3201166#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 3201163#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3201159#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3201164#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3201165#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 3201161#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3201162#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:21:44,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:21:44,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:21:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:21:44,811 INFO L87 Difference]: Start difference. First operand 6661 states and 17547 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:46,099 INFO L93 Difference]: Finished difference Result 8117 states and 20190 transitions. [2022-03-15 21:21:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 21:21:46,099 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:21:46,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:46,110 INFO L225 Difference]: With dead ends: 8117 [2022-03-15 21:21:46,110 INFO L226 Difference]: Without dead ends: 8117 [2022-03-15 21:21:46,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4303 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3361, Invalid=9521, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 21:21:46,112 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 236 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:46,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 1 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:21:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2022-03-15 21:21:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6547. [2022-03-15 21:21:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 2.627253284448518) internal successors, (17198), 6546 states have internal predecessors, (17198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 17198 transitions. [2022-03-15 21:21:46,204 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 17198 transitions. Word has length 29 [2022-03-15 21:21:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:46,204 INFO L470 AbstractCegarLoop]: Abstraction has 6547 states and 17198 transitions. [2022-03-15 21:21:46,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 17198 transitions. [2022-03-15 21:21:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:46,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:46,210 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:46,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:46,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:46,419 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1544813219, now seen corresponding path program 301 times [2022-03-15 21:21:46,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:46,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736984852] [2022-03-15 21:21:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:46,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:46,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:46,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736984852] [2022-03-15 21:21:46,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736984852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:46,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308345887] [2022-03-15 21:21:46,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:21:46,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:46,554 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:46,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-15 21:21:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:46,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:46,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:46,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308345887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:46,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:46,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 31 [2022-03-15 21:21:46,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2094673464] [2022-03-15 21:21:46,832 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:46,833 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:46,839 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 51 transitions. [2022-03-15 21:21:46,839 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:46,987 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [3222729#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 3222722#(< i2 (* 2 N)), 3222728#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 3222726#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3222723#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3222724#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3222725#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3222730#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 3222727#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4)))] [2022-03-15 21:21:46,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:21:46,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:21:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:21:46,988 INFO L87 Difference]: Start difference. First operand 6547 states and 17198 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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 21:21:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:47,220 INFO L93 Difference]: Finished difference Result 7852 states and 19920 transitions. [2022-03-15 21:21:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:21:47,221 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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 29 [2022-03-15 21:21:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:47,232 INFO L225 Difference]: With dead ends: 7852 [2022-03-15 21:21:47,232 INFO L226 Difference]: Without dead ends: 7843 [2022-03-15 21:21:47,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1100, Invalid=2440, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:21:47,232 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 274 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:47,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2022-03-15 21:21:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 6890. [2022-03-15 21:21:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6890 states, 6889 states have (on average 2.6591667876324574) internal successors, (18319), 6889 states have internal predecessors, (18319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6890 states to 6890 states and 18319 transitions. [2022-03-15 21:21:47,329 INFO L78 Accepts]: Start accepts. Automaton has 6890 states and 18319 transitions. Word has length 29 [2022-03-15 21:21:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:47,329 INFO L470 AbstractCegarLoop]: Abstraction has 6890 states and 18319 transitions. [2022-03-15 21:21:47,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 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 21:21:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6890 states and 18319 transitions. [2022-03-15 21:21:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:47,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:47,335 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:47,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-03-15 21:21:47,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-03-15 21:21:47,547 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1331434375, now seen corresponding path program 302 times [2022-03-15 21:21:47,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:47,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992386447] [2022-03-15 21:21:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:47,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 44 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:47,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:47,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992386447] [2022-03-15 21:21:47,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992386447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:47,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906638237] [2022-03-15 21:21:47,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:21:47,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:47,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:47,666 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:47,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-15 21:21:47,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:21:47,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:47,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 44 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:47,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 44 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:47,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906638237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:47,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:47,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22] total 32 [2022-03-15 21:21:47,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [289107912] [2022-03-15 21:21:47,854 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:47,856 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:47,862 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 49 transitions. [2022-03-15 21:21:47,862 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:47,968 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [3244605#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3244608#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 3244607#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 3244603#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3244602#(< i2 (* 2 N)), 3244606#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3244604#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3244609#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1)))] [2022-03-15 21:21:47,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:21:47,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:21:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1128, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:21:47,969 INFO L87 Difference]: Start difference. First operand 6890 states and 18319 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 21:21:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:48,198 INFO L93 Difference]: Finished difference Result 8102 states and 20426 transitions. [2022-03-15 21:21:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:21:48,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 29 [2022-03-15 21:21:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:48,209 INFO L225 Difference]: With dead ends: 8102 [2022-03-15 21:21:48,209 INFO L226 Difference]: Without dead ends: 8094 [2022-03-15 21:21:48,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1161, Invalid=2499, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:21:48,210 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 207 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:48,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8094 states. [2022-03-15 21:21:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8094 to 6821. [2022-03-15 21:21:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6821 states, 6820 states have (on average 2.650293255131965) internal successors, (18075), 6820 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6821 states to 6821 states and 18075 transitions. [2022-03-15 21:21:48,309 INFO L78 Accepts]: Start accepts. Automaton has 6821 states and 18075 transitions. Word has length 29 [2022-03-15 21:21:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:48,309 INFO L470 AbstractCegarLoop]: Abstraction has 6821 states and 18075 transitions. [2022-03-15 21:21:48,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 21:21:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6821 states and 18075 transitions. [2022-03-15 21:21:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:48,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:48,315 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:48,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:48,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-15 21:21:48,531 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1878740515, now seen corresponding path program 303 times [2022-03-15 21:21:48,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:48,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655347516] [2022-03-15 21:21:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:48,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 41 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:48,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:48,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655347516] [2022-03-15 21:21:48,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655347516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:48,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135036422] [2022-03-15 21:21:48,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:21:48,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:48,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:48,600 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:48,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-15 21:21:48,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:21:48,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:48,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:21:48,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-15 21:21:48,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-15 21:21:48,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135036422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:48,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:48,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 4] total 33 [2022-03-15 21:21:48,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [255200752] [2022-03-15 21:21:48,888 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:48,889 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:48,917 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 47 transitions. [2022-03-15 21:21:48,917 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:49,079 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [3266602#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 3266600#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3266598#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3266597#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3266596#(< i2 (* 2 N)), 3266599#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3266601#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4)))] [2022-03-15 21:21:49,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:21:49,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:21:49,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:21:49,080 INFO L87 Difference]: Start difference. First operand 6821 states and 18075 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:49,446 INFO L93 Difference]: Finished difference Result 8271 states and 20746 transitions. [2022-03-15 21:21:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:21:49,446 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:21:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:49,458 INFO L225 Difference]: With dead ends: 8271 [2022-03-15 21:21:49,458 INFO L226 Difference]: Without dead ends: 8264 [2022-03-15 21:21:49,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=762, Invalid=3020, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:21:49,459 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 297 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:49,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8264 states. [2022-03-15 21:21:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8264 to 6749. [2022-03-15 21:21:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 2.642116182572614) internal successors, (17829), 6748 states have internal predecessors, (17829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 17829 transitions. [2022-03-15 21:21:49,554 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 17829 transitions. Word has length 29 [2022-03-15 21:21:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:49,554 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 17829 transitions. [2022-03-15 21:21:49,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 17829 transitions. [2022-03-15 21:21:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:49,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:49,560 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:49,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-15 21:21:49,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:49,766 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1065111559, now seen corresponding path program 304 times [2022-03-15 21:21:49,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:49,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203529008] [2022-03-15 21:21:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:49,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:49,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203529008] [2022-03-15 21:21:49,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203529008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:49,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513549191] [2022-03-15 21:21:49,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:21:49,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:49,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:49,875 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:49,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-15 21:21:49,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:21:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:49,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:49,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:50,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513549191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:50,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:50,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 21] total 31 [2022-03-15 21:21:50,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [295852702] [2022-03-15 21:21:50,138 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:50,140 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:50,145 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2022-03-15 21:21:50,145 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:50,218 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3288615#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3288614#(< i2 (* 2 N)), 3288617#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3288616#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3288618#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3288619#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4)))] [2022-03-15 21:21:50,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:21:50,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:21:50,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=931, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:21:50,218 INFO L87 Difference]: Start difference. First operand 6749 states and 17829 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:50,434 INFO L93 Difference]: Finished difference Result 8346 states and 20841 transitions. [2022-03-15 21:21:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:21:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:21:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:50,446 INFO L225 Difference]: With dead ends: 8346 [2022-03-15 21:21:50,446 INFO L226 Difference]: Without dead ends: 8340 [2022-03-15 21:21:50,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1169, Invalid=2371, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:21:50,446 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 179 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:50,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2022-03-15 21:21:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 6674. [2022-03-15 21:21:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6674 states, 6673 states have (on average 2.6346470852689943) internal successors, (17581), 6673 states have internal predecessors, (17581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6674 states to 6674 states and 17581 transitions. [2022-03-15 21:21:50,542 INFO L78 Accepts]: Start accepts. Automaton has 6674 states and 17581 transitions. Word has length 29 [2022-03-15 21:21:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:50,542 INFO L470 AbstractCegarLoop]: Abstraction has 6674 states and 17581 transitions. [2022-03-15 21:21:50,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6674 states and 17581 transitions. [2022-03-15 21:21:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:50,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:50,548 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:50,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-03-15 21:21:50,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2022-03-15 21:21:50,763 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:50,764 INFO L85 PathProgramCache]: Analyzing trace with hash 346128803, now seen corresponding path program 305 times [2022-03-15 21:21:50,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:50,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168895343] [2022-03-15 21:21:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:50,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 41 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:50,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:50,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168895343] [2022-03-15 21:21:50,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168895343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:50,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637620674] [2022-03-15 21:21:50,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:21:50,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:50,848 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:50,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-15 21:21:50,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:21:50,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:50,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:50,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 41 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:50,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 41 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:51,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637620674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:51,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:51,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 29 [2022-03-15 21:21:51,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [233331027] [2022-03-15 21:21:51,079 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:51,080 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:51,086 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 43 transitions. [2022-03-15 21:21:51,087 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:51,184 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [3310557#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3310556#(< i2 (* 2 N)), 3310558#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3310560#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3310559#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1)))] [2022-03-15 21:21:51,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:21:51,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:21:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:21:51,185 INFO L87 Difference]: Start difference. First operand 6674 states and 17581 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:51,444 INFO L93 Difference]: Finished difference Result 8318 states and 20701 transitions. [2022-03-15 21:21:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:21:51,444 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:21:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:51,456 INFO L225 Difference]: With dead ends: 8318 [2022-03-15 21:21:51,456 INFO L226 Difference]: Without dead ends: 8313 [2022-03-15 21:21:51,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1102, Invalid=2204, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:21:51,456 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 127 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:51,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8313 states. [2022-03-15 21:21:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8313 to 6596. [2022-03-15 21:21:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.6278999241849887) internal successors, (17331), 6595 states have internal predecessors, (17331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17331 transitions. [2022-03-15 21:21:51,552 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17331 transitions. Word has length 29 [2022-03-15 21:21:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:51,552 INFO L470 AbstractCegarLoop]: Abstraction has 6596 states and 17331 transitions. [2022-03-15 21:21:51,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:51,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17331 transitions. [2022-03-15 21:21:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:51,558 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:51,558 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:51,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:51,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:51,774 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash 461483143, now seen corresponding path program 306 times [2022-03-15 21:21:51,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:51,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770845108] [2022-03-15 21:21:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:51,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 44 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:51,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:51,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770845108] [2022-03-15 21:21:51,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770845108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:51,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837395867] [2022-03-15 21:21:51,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:21:51,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:51,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:51,847 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:51,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-15 21:21:51,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:21:51,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:51,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:51,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 44 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:51,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 44 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:52,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837395867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:52,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:52,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 20] total 30 [2022-03-15 21:21:52,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1179149101] [2022-03-15 21:21:52,138 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:52,140 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:52,145 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:21:52,145 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:52,215 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [3332319#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3332317#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3332318#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3332316#(< i2 (* 2 N))] [2022-03-15 21:21:52,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:21:52,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:21:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=751, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:21:52,215 INFO L87 Difference]: Start difference. First operand 6596 states and 17331 transitions. Second operand has 20 states, 20 states have (on average 1.9) 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 21:21:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:52,489 INFO L93 Difference]: Finished difference Result 8191 states and 20332 transitions. [2022-03-15 21:21:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:21:52,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) 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 29 [2022-03-15 21:21:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:52,500 INFO L225 Difference]: With dead ends: 8191 [2022-03-15 21:21:52,500 INFO L226 Difference]: Without dead ends: 8187 [2022-03-15 21:21:52,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1160, Invalid=2262, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:21:52,501 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 186 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:52,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8187 states. [2022-03-15 21:21:52,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8187 to 6596. [2022-03-15 21:21:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.6269901440485217) internal successors, (17325), 6595 states have internal predecessors, (17325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17325 transitions. [2022-03-15 21:21:52,594 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17325 transitions. Word has length 29 [2022-03-15 21:21:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:52,594 INFO L470 AbstractCegarLoop]: Abstraction has 6596 states and 17325 transitions. [2022-03-15 21:21:52,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) 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 21:21:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17325 transitions. [2022-03-15 21:21:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:52,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:52,600 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:52,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-03-15 21:21:52,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2022-03-15 21:21:52,807 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:52,808 INFO L85 PathProgramCache]: Analyzing trace with hash 742298915, now seen corresponding path program 307 times [2022-03-15 21:21:52,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:52,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979157103] [2022-03-15 21:21:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:52,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:52,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:52,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979157103] [2022-03-15 21:21:52,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979157103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:52,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778845146] [2022-03-15 21:21:52,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:21:52,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:52,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:52,892 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:52,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-15 21:21:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:52,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:52,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:52,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:53,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778845146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:53,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:53,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 18] total 28 [2022-03-15 21:21:53,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [126934749] [2022-03-15 21:21:53,187 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:53,189 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:53,194 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2022-03-15 21:21:53,194 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:53,243 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3353949#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3353948#(< i2 (* 2 N)), 3353950#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N)))] [2022-03-15 21:21:53,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:21:53,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:21:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=610, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:21:53,244 INFO L87 Difference]: Start difference. First operand 6596 states and 17325 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:21:53,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:53,549 INFO L93 Difference]: Finished difference Result 8079 states and 20085 transitions. [2022-03-15 21:21:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:21:53,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 29 [2022-03-15 21:21:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:53,559 INFO L225 Difference]: With dead ends: 8079 [2022-03-15 21:21:53,559 INFO L226 Difference]: Without dead ends: 8076 [2022-03-15 21:21:53,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1077, Invalid=2115, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:21:53,560 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:53,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2022-03-15 21:21:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 6596. [2022-03-15 21:21:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.626535253980288) internal successors, (17322), 6595 states have internal predecessors, (17322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17322 transitions. [2022-03-15 21:21:53,653 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17322 transitions. Word has length 29 [2022-03-15 21:21:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:53,653 INFO L470 AbstractCegarLoop]: Abstraction has 6596 states and 17322 transitions. [2022-03-15 21:21:53,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 21:21:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17322 transitions. [2022-03-15 21:21:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:53,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:53,660 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:53,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-03-15 21:21:53,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-03-15 21:21:53,873 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:53,874 INFO L85 PathProgramCache]: Analyzing trace with hash -634115833, now seen corresponding path program 308 times [2022-03-15 21:21:53,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:53,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786517759] [2022-03-15 21:21:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:53,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:53,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786517759] [2022-03-15 21:21:53,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786517759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:53,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235652792] [2022-03-15 21:21:53,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:21:53,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:53,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:53,943 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:53,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-15 21:21:53,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:21:53,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:53,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:54,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:54,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235652792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:54,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:54,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 29 [2022-03-15 21:21:54,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1451034949] [2022-03-15 21:21:54,231 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:54,233 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:54,240 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:21:54,240 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:54,275 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3375470#(< i2 (* 2 N)), 3375471#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:21:54,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:21:54,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:54,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:21:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:21:54,275 INFO L87 Difference]: Start difference. First operand 6596 states and 17322 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:21:54,578 INFO L93 Difference]: Finished difference Result 8063 states and 20118 transitions. [2022-03-15 21:21:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:21:54,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:21:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:21:54,589 INFO L225 Difference]: With dead ends: 8063 [2022-03-15 21:21:54,590 INFO L226 Difference]: Without dead ends: 8061 [2022-03-15 21:21:54,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1135, Invalid=2171, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:21:54,590 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 99 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:21:54,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:21:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2022-03-15 21:21:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6683. [2022-03-15 21:21:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6683 states, 6682 states have (on average 2.6318467524693205) internal successors, (17586), 6682 states have internal predecessors, (17586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:21:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6683 states to 6683 states and 17586 transitions. [2022-03-15 21:21:54,689 INFO L78 Accepts]: Start accepts. Automaton has 6683 states and 17586 transitions. Word has length 29 [2022-03-15 21:21:54,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:21:54,689 INFO L470 AbstractCegarLoop]: Abstraction has 6683 states and 17586 transitions. [2022-03-15 21:21:54,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:21:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6683 states and 17586 transitions. [2022-03-15 21:21:54,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:21:54,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:21:54,695 INFO L514 BasicCegarLoop]: trace histogram [12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:21:54,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-03-15 21:21:54,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:54,911 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:21:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:21:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1277533699, now seen corresponding path program 309 times [2022-03-15 21:21:54,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:21:54,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820568691] [2022-03-15 21:21:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:21:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:21:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:21:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:21:55,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:21:55,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820568691] [2022-03-15 21:21:55,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820568691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:21:55,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176931349] [2022-03-15 21:21:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:21:55,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:21:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:21:55,029 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:21:55,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-15 21:21:55,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:21:55,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:21:55,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:21:55,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:21:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:55,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:21:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:21:55,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176931349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:21:55,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:21:55,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 23] total 35 [2022-03-15 21:21:55,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [106055266] [2022-03-15 21:21:55,301 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:21:55,303 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:21:55,311 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 77 transitions. [2022-03-15 21:21:55,311 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:21:55,661 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 22 new interpolants: [3397170#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 3397171#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 3397172#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 3397169#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 3397168#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 3397177#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 3397158#(< i2 (* 2 N)), 3397161#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 3397165#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 3397163#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 3397175#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 3397166#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 3397176#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3397173#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3397159#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 3397178#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 7 i2))), 3397160#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 3397167#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 3397174#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 3397162#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 3397157#(< i1 (* 2 N)), 3397164#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:21:55,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 21:21:55,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:21:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 21:21:55,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=2645, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:21:55,662 INFO L87 Difference]: Start difference. First operand 6683 states and 17586 transitions. Second operand has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 43 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:01,703 INFO L93 Difference]: Finished difference Result 11472 states and 26970 transitions. [2022-03-15 21:22:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-03-15 21:22:01,703 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 43 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:01,718 INFO L225 Difference]: With dead ends: 11472 [2022-03-15 21:22:01,718 INFO L226 Difference]: Without dead ends: 10786 [2022-03-15 21:22:01,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22483 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9577, Invalid=52175, Unknown=0, NotChecked=0, Total=61752 [2022-03-15 21:22:01,722 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 644 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:01,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 1 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:22:01,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10786 states. [2022-03-15 21:22:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10786 to 5779. [2022-03-15 21:22:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.5363447559709242) internal successors, (14655), 5778 states have internal predecessors, (14655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 14655 transitions. [2022-03-15 21:22:01,814 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 14655 transitions. Word has length 29 [2022-03-15 21:22:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:01,814 INFO L470 AbstractCegarLoop]: Abstraction has 5779 states and 14655 transitions. [2022-03-15 21:22:01,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 43 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 14655 transitions. [2022-03-15 21:22:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:01,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:01,819 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:01,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:02,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-15 21:22:02,031 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:02,032 INFO L85 PathProgramCache]: Analyzing trace with hash -955610973, now seen corresponding path program 310 times [2022-03-15 21:22:02,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:02,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571050704] [2022-03-15 21:22:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:02,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 65 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:02,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:02,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571050704] [2022-03-15 21:22:02,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571050704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:02,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371174049] [2022-03-15 21:22:02,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:22:02,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:02,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:02,107 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:02,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-15 21:22:02,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:22:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:02,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:02,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 65 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:02,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 65 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:02,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371174049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:02,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:02,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:22:02,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1940515599] [2022-03-15 21:22:02,405 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:02,406 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:02,412 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2022-03-15 21:22:02,412 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:02,427 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3420789#(< i2 (* 2 N))] [2022-03-15 21:22:02,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:22:02,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:02,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:22:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:22:02,427 INFO L87 Difference]: Start difference. First operand 5779 states and 14655 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:02,801 INFO L93 Difference]: Finished difference Result 7363 states and 17713 transitions. [2022-03-15 21:22:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:22:02,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:02,811 INFO L225 Difference]: With dead ends: 7363 [2022-03-15 21:22:02,811 INFO L226 Difference]: Without dead ends: 7361 [2022-03-15 21:22:02,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1168, Invalid=2254, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:22:02,812 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 101 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:02,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2022-03-15 21:22:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 5776. [2022-03-15 21:22:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 2.5352380952380953) internal successors, (14641), 5775 states have internal predecessors, (14641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 14641 transitions. [2022-03-15 21:22:02,917 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 14641 transitions. Word has length 29 [2022-03-15 21:22:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:02,917 INFO L470 AbstractCegarLoop]: Abstraction has 5776 states and 14641 transitions. [2022-03-15 21:22:02,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 14641 transitions. [2022-03-15 21:22:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:02,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:02,922 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:02,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-03-15 21:22:03,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-15 21:22:03,138 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1454312313, now seen corresponding path program 311 times [2022-03-15 21:22:03,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:03,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578504716] [2022-03-15 21:22:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:03,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:03,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:03,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578504716] [2022-03-15 21:22:03,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578504716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:03,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825978166] [2022-03-15 21:22:03,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:22:03,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:03,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:03,229 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:03,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-15 21:22:03,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:22:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:03,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:03,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:03,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:03,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825978166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:03,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:03,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:22:03,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [169952976] [2022-03-15 21:22:03,552 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:03,554 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:03,559 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2022-03-15 21:22:03,559 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:03,613 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3439960#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:22:03,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:22:03,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:22:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:22:03,614 INFO L87 Difference]: Start difference. First operand 5776 states and 14641 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:22:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:03,910 INFO L93 Difference]: Finished difference Result 7780 states and 18467 transitions. [2022-03-15 21:22:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:22:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 29 [2022-03-15 21:22:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:03,921 INFO L225 Difference]: With dead ends: 7780 [2022-03-15 21:22:03,921 INFO L226 Difference]: Without dead ends: 7780 [2022-03-15 21:22:03,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=970, Invalid=1892, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:22:03,921 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 121 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:03,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 1 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7780 states. [2022-03-15 21:22:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7780 to 5777. [2022-03-15 21:22:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5776 states have (on average 2.535318559556787) internal successors, (14644), 5776 states have internal predecessors, (14644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 14644 transitions. [2022-03-15 21:22:03,998 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 14644 transitions. Word has length 29 [2022-03-15 21:22:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:03,998 INFO L470 AbstractCegarLoop]: Abstraction has 5777 states and 14644 transitions. [2022-03-15 21:22:03,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 21:22:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 14644 transitions. [2022-03-15 21:22:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:04,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:04,004 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:04,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-15 21:22:04,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-03-15 21:22:04,219 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1985348329, now seen corresponding path program 312 times [2022-03-15 21:22:04,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:04,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81258028] [2022-03-15 21:22:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:04,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:04,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:04,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81258028] [2022-03-15 21:22:04,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81258028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:04,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269695419] [2022-03-15 21:22:04,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:22:04,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:04,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:04,301 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:04,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-15 21:22:04,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:22:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:04,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:04,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269695419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:04,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:04,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 20] total 31 [2022-03-15 21:22:04,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [929832191] [2022-03-15 21:22:04,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:04,593 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:04,598 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2022-03-15 21:22:04,598 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:04,665 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3459540#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3459539#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:22:04,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:22:04,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:04,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:22:04,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=705, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:22:04,665 INFO L87 Difference]: Start difference. First operand 5777 states and 14644 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) 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 21:22:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:05,006 INFO L93 Difference]: Finished difference Result 8078 states and 19033 transitions. [2022-03-15 21:22:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:22:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 29 [2022-03-15 21:22:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:05,017 INFO L225 Difference]: With dead ends: 8078 [2022-03-15 21:22:05,018 INFO L226 Difference]: Without dead ends: 8078 [2022-03-15 21:22:05,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1295, Invalid=2865, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:22:05,018 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 171 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:05,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2022-03-15 21:22:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 5779. [2022-03-15 21:22:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.5354794046382834) internal successors, (14650), 5778 states have internal predecessors, (14650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 14650 transitions. [2022-03-15 21:22:05,098 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 14650 transitions. Word has length 29 [2022-03-15 21:22:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:05,098 INFO L470 AbstractCegarLoop]: Abstraction has 5779 states and 14650 transitions. [2022-03-15 21:22:05,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) 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 21:22:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 14650 transitions. [2022-03-15 21:22:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:05,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:05,103 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:05,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:05,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:05,319 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:05,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1240645831, now seen corresponding path program 313 times [2022-03-15 21:22:05,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:05,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063354814] [2022-03-15 21:22:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:05,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:05,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:05,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063354814] [2022-03-15 21:22:05,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063354814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:05,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080994081] [2022-03-15 21:22:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:22:05,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:05,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:05,456 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:05,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-15 21:22:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:05,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:05,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080994081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:05,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:05,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:22:05,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1510546406] [2022-03-15 21:22:05,801 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:05,802 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:05,808 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2022-03-15 21:22:05,808 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:05,889 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3479439#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3479440#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3479441#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:22:05,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:22:05,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:22:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:22:05,889 INFO L87 Difference]: Start difference. First operand 5779 states and 14650 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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 21:22:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:06,329 INFO L93 Difference]: Finished difference Result 8219 states and 19255 transitions. [2022-03-15 21:22:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 21:22:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 29 [2022-03-15 21:22:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:06,340 INFO L225 Difference]: With dead ends: 8219 [2022-03-15 21:22:06,341 INFO L226 Difference]: Without dead ends: 8219 [2022-03-15 21:22:06,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1700, Invalid=4306, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:22:06,342 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 182 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:06,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2022-03-15 21:22:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 5781. [2022-03-15 21:22:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5781 states, 5780 states have (on average 2.5356401384083047) internal successors, (14656), 5780 states have internal predecessors, (14656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5781 states to 5781 states and 14656 transitions. [2022-03-15 21:22:06,425 INFO L78 Accepts]: Start accepts. Automaton has 5781 states and 14656 transitions. Word has length 29 [2022-03-15 21:22:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:06,426 INFO L470 AbstractCegarLoop]: Abstraction has 5781 states and 14656 transitions. [2022-03-15 21:22:06,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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 21:22:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 5781 states and 14656 transitions. [2022-03-15 21:22:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:06,431 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:06,431 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:06,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-03-15 21:22:06,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:06,647 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash -370295127, now seen corresponding path program 314 times [2022-03-15 21:22:06,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:06,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303556283] [2022-03-15 21:22:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:06,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:06,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:06,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303556283] [2022-03-15 21:22:06,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303556283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:06,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730765929] [2022-03-15 21:22:06,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:22:06,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:06,727 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:06,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-15 21:22:06,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:22:06,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:06,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:07,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730765929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:07,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:07,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 21] total 32 [2022-03-15 21:22:07,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [262371845] [2022-03-15 21:22:07,058 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:07,059 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:07,065 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 49 transitions. [2022-03-15 21:22:07,065 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:07,165 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [3499510#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3499512#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3499513#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3499511#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:22:07,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:22:07,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:22:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=920, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:22:07,165 INFO L87 Difference]: Start difference. First operand 5781 states and 14656 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) 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 21:22:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:07,765 INFO L93 Difference]: Finished difference Result 8187 states and 19131 transitions. [2022-03-15 21:22:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:22:07,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 29 [2022-03-15 21:22:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:07,776 INFO L225 Difference]: With dead ends: 8187 [2022-03-15 21:22:07,776 INFO L226 Difference]: Without dead ends: 8187 [2022-03-15 21:22:07,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1937, Invalid=4869, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:22:07,777 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 204 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:07,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8187 states. [2022-03-15 21:22:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8187 to 5783. [2022-03-15 21:22:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 2.535800760982359) internal successors, (14662), 5782 states have internal predecessors, (14662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 14662 transitions. [2022-03-15 21:22:07,883 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 14662 transitions. Word has length 29 [2022-03-15 21:22:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:07,883 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 14662 transitions. [2022-03-15 21:22:07,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) 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 21:22:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 14662 transitions. [2022-03-15 21:22:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:07,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:07,889 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:07,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:08,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-03-15 21:22:08,104 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1230142727, now seen corresponding path program 315 times [2022-03-15 21:22:08,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:08,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756093156] [2022-03-15 21:22:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:08,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:08,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:08,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756093156] [2022-03-15 21:22:08,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756093156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:08,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929273019] [2022-03-15 21:22:08,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:22:08,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:08,237 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:08,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-15 21:22:08,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:22:08,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:08,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:08,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:08,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:08,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929273019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:08,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:08,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 32 [2022-03-15 21:22:08,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [687597110] [2022-03-15 21:22:08,557 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:08,559 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:08,565 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 53 transitions. [2022-03-15 21:22:08,565 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:08,745 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [3519560#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3519562#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3519564#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3519563#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3519561#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:22:08,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:22:08,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:22:08,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:22:08,746 INFO L87 Difference]: Start difference. First operand 5783 states and 14662 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) 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 21:22:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:09,703 INFO L93 Difference]: Finished difference Result 8065 states and 18849 transitions. [2022-03-15 21:22:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 21:22:09,704 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 29 [2022-03-15 21:22:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:09,714 INFO L225 Difference]: With dead ends: 8065 [2022-03-15 21:22:09,714 INFO L226 Difference]: Without dead ends: 8065 [2022-03-15 21:22:09,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2535, Invalid=6971, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 21:22:09,716 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 217 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:09,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 1 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-03-15 21:22:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 5785. [2022-03-15 21:22:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5785 states, 5784 states have (on average 2.535961272475795) internal successors, (14668), 5784 states have internal predecessors, (14668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 14668 transitions. [2022-03-15 21:22:09,793 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 14668 transitions. Word has length 29 [2022-03-15 21:22:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:09,793 INFO L470 AbstractCegarLoop]: Abstraction has 5785 states and 14668 transitions. [2022-03-15 21:22:09,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) 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 21:22:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 14668 transitions. [2022-03-15 21:22:09,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:09,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:09,798 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:09,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:09,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:09,999 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash -695891351, now seen corresponding path program 316 times [2022-03-15 21:22:10,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:10,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702254269] [2022-03-15 21:22:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:10,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:10,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:10,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702254269] [2022-03-15 21:22:10,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702254269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:10,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474903020] [2022-03-15 21:22:10,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:22:10,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:10,129 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:10,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-15 21:22:10,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:22:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:10,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:10,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474903020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:10,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:10,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22] total 33 [2022-03-15 21:22:10,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1775446177] [2022-03-15 21:22:10,467 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:10,469 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:10,475 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 57 transitions. [2022-03-15 21:22:10,475 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:10,630 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3539522#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3539524#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3539526#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3539525#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3539523#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3539527#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:22:10,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:22:10,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:10,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:22:10,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:22:10,630 INFO L87 Difference]: Start difference. First operand 5785 states and 14668 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) 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 21:22:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:11,363 INFO L93 Difference]: Finished difference Result 7746 states and 18200 transitions. [2022-03-15 21:22:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 21:22:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) 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 29 [2022-03-15 21:22:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:11,373 INFO L225 Difference]: With dead ends: 7746 [2022-03-15 21:22:11,373 INFO L226 Difference]: Without dead ends: 7746 [2022-03-15 21:22:11,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2612, Invalid=7090, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 21:22:11,374 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 210 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:11,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2022-03-15 21:22:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 5787. [2022-03-15 21:22:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5787 states, 5786 states have (on average 2.536121673003802) internal successors, (14674), 5786 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5787 states to 5787 states and 14674 transitions. [2022-03-15 21:22:11,449 INFO L78 Accepts]: Start accepts. Automaton has 5787 states and 14674 transitions. Word has length 29 [2022-03-15 21:22:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:11,449 INFO L470 AbstractCegarLoop]: Abstraction has 5787 states and 14674 transitions. [2022-03-15 21:22:11,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) 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 21:22:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5787 states and 14674 transitions. [2022-03-15 21:22:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:11,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:11,455 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:11,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-03-15 21:22:11,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:11,670 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:11,671 INFO L85 PathProgramCache]: Analyzing trace with hash -273405625, now seen corresponding path program 317 times [2022-03-15 21:22:11,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:11,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700075637] [2022-03-15 21:22:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:11,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:11,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:11,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700075637] [2022-03-15 21:22:11,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700075637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:11,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64912520] [2022-03-15 21:22:11,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:22:11,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:11,754 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:11,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-15 21:22:11,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:22:11,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:11,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:11,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:11,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64912520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:11,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:11,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 33 [2022-03-15 21:22:11,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [839794443] [2022-03-15 21:22:11,984 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:11,986 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:11,992 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 61 transitions. [2022-03-15 21:22:11,992 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:12,151 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [3559171#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3559170#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3559172#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3559173#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3559174#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 3559169#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3559168#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:22:12,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:22:12,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:12,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:22:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:22:12,152 INFO L87 Difference]: Start difference. First operand 5787 states and 14674 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) 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 21:22:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:13,083 INFO L93 Difference]: Finished difference Result 7441 states and 17646 transitions. [2022-03-15 21:22:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 21:22:13,084 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) 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 29 [2022-03-15 21:22:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:13,094 INFO L225 Difference]: With dead ends: 7441 [2022-03-15 21:22:13,095 INFO L226 Difference]: Without dead ends: 7441 [2022-03-15 21:22:13,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3347, Invalid=9535, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 21:22:13,097 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 241 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:13,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7441 states. [2022-03-15 21:22:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7441 to 5701. [2022-03-15 21:22:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 5700 states have (on average 2.547719298245614) internal successors, (14522), 5700 states have internal predecessors, (14522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 14522 transitions. [2022-03-15 21:22:13,170 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 14522 transitions. Word has length 29 [2022-03-15 21:22:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:13,170 INFO L470 AbstractCegarLoop]: Abstraction has 5701 states and 14522 transitions. [2022-03-15 21:22:13,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) 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 21:22:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 14522 transitions. [2022-03-15 21:22:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:13,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:13,206 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:13,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:13,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:13,422 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:13,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash -61250007, now seen corresponding path program 318 times [2022-03-15 21:22:13,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:13,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98840262] [2022-03-15 21:22:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:13,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:13,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:13,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98840262] [2022-03-15 21:22:13,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98840262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:13,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804043796] [2022-03-15 21:22:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:22:13,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:13,545 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:13,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-15 21:22:13,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:22:13,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:13,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:13,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:13,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:13,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804043796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:13,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:13,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 23] total 34 [2022-03-15 21:22:13,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1045250774] [2022-03-15 21:22:13,812 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:13,813 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:13,820 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 65 transitions. [2022-03-15 21:22:13,820 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:14,056 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [3578368#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3578371#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3578369#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3578374#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 3578370#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3578373#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 3578372#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3578367#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:22:14,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:22:14,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:14,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:22:14,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:22:14,057 INFO L87 Difference]: Start difference. First operand 5701 states and 14522 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:14,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:14,990 INFO L93 Difference]: Finished difference Result 6688 states and 16221 transitions. [2022-03-15 21:22:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 21:22:14,990 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:15,000 INFO L225 Difference]: With dead ends: 6688 [2022-03-15 21:22:15,000 INFO L226 Difference]: Without dead ends: 6688 [2022-03-15 21:22:15,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3952 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3092, Invalid=8898, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 21:22:15,002 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 199 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:15,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2022-03-15 21:22:15,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 5638. [2022-03-15 21:22:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5638 states, 5637 states have (on average 2.541422742593578) internal successors, (14326), 5637 states have internal predecessors, (14326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5638 states to 5638 states and 14326 transitions. [2022-03-15 21:22:15,075 INFO L78 Accepts]: Start accepts. Automaton has 5638 states and 14326 transitions. Word has length 29 [2022-03-15 21:22:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:15,075 INFO L470 AbstractCegarLoop]: Abstraction has 5638 states and 14326 transitions. [2022-03-15 21:22:15,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5638 states and 14326 transitions. [2022-03-15 21:22:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:15,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:15,081 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:15,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:15,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-15 21:22:15,287 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2074360441, now seen corresponding path program 319 times [2022-03-15 21:22:15,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:15,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714481921] [2022-03-15 21:22:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:15,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:15,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:15,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714481921] [2022-03-15 21:22:15,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714481921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:15,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292917754] [2022-03-15 21:22:15,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:22:15,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:15,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:15,440 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:15,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-15 21:22:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:15,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:15,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292917754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:15,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:15,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 34 [2022-03-15 21:22:15,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1865318595] [2022-03-15 21:22:15,648 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:15,649 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:15,657 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 69 transitions. [2022-03-15 21:22:15,657 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:15,867 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [3596676#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3596682#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 3596681#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3596684#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 3596677#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3596683#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 3596678#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3596680#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3596679#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:22:15,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:22:15,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:22:15,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:22:15,868 INFO L87 Difference]: Start difference. First operand 5638 states and 14326 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:17,215 INFO L93 Difference]: Finished difference Result 6941 states and 16897 transitions. [2022-03-15 21:22:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 21:22:17,215 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:17,225 INFO L225 Difference]: With dead ends: 6941 [2022-03-15 21:22:17,225 INFO L226 Difference]: Without dead ends: 6941 [2022-03-15 21:22:17,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6145 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4609, Invalid=13213, Unknown=0, NotChecked=0, Total=17822 [2022-03-15 21:22:17,227 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 264 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:17,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 1 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2022-03-15 21:22:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 5658. [2022-03-15 21:22:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 5657 states have (on average 2.5430440162630368) internal successors, (14386), 5657 states have internal predecessors, (14386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 14386 transitions. [2022-03-15 21:22:17,302 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 14386 transitions. Word has length 29 [2022-03-15 21:22:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:17,302 INFO L470 AbstractCegarLoop]: Abstraction has 5658 states and 14386 transitions. [2022-03-15 21:22:17,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 14386 transitions. [2022-03-15 21:22:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:17,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:17,308 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:17,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:17,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-03-15 21:22:17,523 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1756360937, now seen corresponding path program 320 times [2022-03-15 21:22:17,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:17,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416800916] [2022-03-15 21:22:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:17,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:17,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416800916] [2022-03-15 21:22:17,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416800916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:17,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185850730] [2022-03-15 21:22:17,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:22:17,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:17,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:17,669 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:17,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-15 21:22:17,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:22:17,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:17,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:17,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:17,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:17,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185850730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:17,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:17,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 34 [2022-03-15 21:22:17,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [321657618] [2022-03-15 21:22:17,952 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:17,954 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:17,960 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:17,960 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:18,124 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [3615332#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 3615329#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3615328#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3615325#(< i2 (* 2 N)), 3615334#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 8))), 3615327#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3615330#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 3615331#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 3615333#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 3615326#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:22:18,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:22:18,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:18,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:22:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=1394, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:22:18,125 INFO L87 Difference]: Start difference. First operand 5658 states and 14386 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 21:22:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:18,408 INFO L93 Difference]: Finished difference Result 6454 states and 15620 transitions. [2022-03-15 21:22:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:22:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 29 [2022-03-15 21:22:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:18,416 INFO L225 Difference]: With dead ends: 6454 [2022-03-15 21:22:18,416 INFO L226 Difference]: Without dead ends: 6444 [2022-03-15 21:22:18,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1331, Invalid=2959, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:22:18,417 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 451 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:18,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 1 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6444 states. [2022-03-15 21:22:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6444 to 5597. [2022-03-15 21:22:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5596 states have (on average 2.5335954253037882) internal successors, (14178), 5596 states have internal predecessors, (14178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 14178 transitions. [2022-03-15 21:22:18,483 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 14178 transitions. Word has length 29 [2022-03-15 21:22:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:18,484 INFO L470 AbstractCegarLoop]: Abstraction has 5597 states and 14178 transitions. [2022-03-15 21:22:18,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 21:22:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 14178 transitions. [2022-03-15 21:22:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:18,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:18,517 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:18,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:18,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-15 21:22:18,732 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:18,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1446786659, now seen corresponding path program 321 times [2022-03-15 21:22:18,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:18,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845651817] [2022-03-15 21:22:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:18,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:18,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:18,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845651817] [2022-03-15 21:22:18,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845651817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:18,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416689430] [2022-03-15 21:22:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:22:18,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:18,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:18,870 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:18,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-15 21:22:18,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:22:18,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:18,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:22:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 21:22:19,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-15 21:22:19,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416689430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:19,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:19,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 4] total 36 [2022-03-15 21:22:19,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [935989303] [2022-03-15 21:22:19,237 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:19,238 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:19,245 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:19,245 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:19,484 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [3633232#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3633236#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 3633234#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3633238#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 3633230#(< i2 (* 2 N)), 3633235#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 3633231#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3633233#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3633237#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1)))] [2022-03-15 21:22:19,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:22:19,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:22:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:22:19,484 INFO L87 Difference]: Start difference. First operand 5597 states and 14178 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 21:22:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:19,889 INFO L93 Difference]: Finished difference Result 6710 states and 16151 transitions. [2022-03-15 21:22:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:22:19,889 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 29 [2022-03-15 21:22:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:19,898 INFO L225 Difference]: With dead ends: 6710 [2022-03-15 21:22:19,898 INFO L226 Difference]: Without dead ends: 6701 [2022-03-15 21:22:19,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=947, Invalid=3609, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:22:19,898 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 214 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:19,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 1 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2022-03-15 21:22:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 5535. [2022-03-15 21:22:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5535 states, 5534 states have (on average 2.524213950126491) internal successors, (13969), 5534 states have internal predecessors, (13969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5535 states to 5535 states and 13969 transitions. [2022-03-15 21:22:19,967 INFO L78 Accepts]: Start accepts. Automaton has 5535 states and 13969 transitions. Word has length 29 [2022-03-15 21:22:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:19,967 INFO L470 AbstractCegarLoop]: Abstraction has 5535 states and 13969 transitions. [2022-03-15 21:22:19,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 21:22:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5535 states and 13969 transitions. [2022-03-15 21:22:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:19,972 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:19,972 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:19,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:20,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-15 21:22:20,187 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1749788247, now seen corresponding path program 322 times [2022-03-15 21:22:20,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:20,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557422181] [2022-03-15 21:22:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:20,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:20,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:20,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557422181] [2022-03-15 21:22:20,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557422181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:20,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761982981] [2022-03-15 21:22:20,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:22:20,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:20,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:20,298 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:20,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-15 21:22:20,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:22:20,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:20,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:20,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:20,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:20,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761982981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:20,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:20,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 33 [2022-03-15 21:22:20,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [515398115] [2022-03-15 21:22:20,544 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:20,546 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:20,552 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:20,552 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:20,711 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [3651265#(< i2 (* 2 N)), 3651266#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3651269#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3651267#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3651268#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3651272#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 3651271#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 3651270#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4)))] [2022-03-15 21:22:20,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:22:20,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:22:20,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=1175, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:22:20,712 INFO L87 Difference]: Start difference. First operand 5535 states and 13969 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:21,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:21,029 INFO L93 Difference]: Finished difference Result 6902 states and 16539 transitions. [2022-03-15 21:22:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:22:21,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:21,038 INFO L225 Difference]: With dead ends: 6902 [2022-03-15 21:22:21,038 INFO L226 Difference]: Without dead ends: 6894 [2022-03-15 21:22:21,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1342, Invalid=2818, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:22:21,039 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 224 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:21,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6894 states. [2022-03-15 21:22:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6894 to 5471. [2022-03-15 21:22:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5471 states, 5470 states have (on average 2.5151736745886653) internal successors, (13758), 5470 states have internal predecessors, (13758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5471 states to 5471 states and 13758 transitions. [2022-03-15 21:22:21,106 INFO L78 Accepts]: Start accepts. Automaton has 5471 states and 13758 transitions. Word has length 29 [2022-03-15 21:22:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:21,107 INFO L470 AbstractCegarLoop]: Abstraction has 5471 states and 13758 transitions. [2022-03-15 21:22:21,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5471 states and 13758 transitions. [2022-03-15 21:22:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:21,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:21,112 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:21,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-03-15 21:22:21,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:21,327 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash -190335581, now seen corresponding path program 323 times [2022-03-15 21:22:21,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:21,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107838916] [2022-03-15 21:22:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:21,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:21,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107838916] [2022-03-15 21:22:21,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107838916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:21,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229670736] [2022-03-15 21:22:21,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:22:21,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:21,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:21,427 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:21,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-15 21:22:21,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:22:21,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:21,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:21,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229670736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:21,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:21,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 32 [2022-03-15 21:22:21,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1551702414] [2022-03-15 21:22:21,700 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:21,702 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:21,708 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:21,708 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:21,869 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [3669365#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3669364#(< i2 (* 2 N)), 3669366#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3669370#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 3669367#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3669369#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 3669368#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:22:21,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:22:21,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:22:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1047, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:22:21,870 INFO L87 Difference]: Start difference. First operand 5471 states and 13758 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) 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 21:22:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:22,210 INFO L93 Difference]: Finished difference Result 7007 states and 16727 transitions. [2022-03-15 21:22:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:22:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) 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 29 [2022-03-15 21:22:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:22,219 INFO L225 Difference]: With dead ends: 7007 [2022-03-15 21:22:22,219 INFO L226 Difference]: Without dead ends: 7000 [2022-03-15 21:22:22,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1320, Invalid=2712, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:22:22,220 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 201 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:22,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7000 states. [2022-03-15 21:22:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7000 to 5406. [2022-03-15 21:22:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 5405 states have (on average 2.5061979648473636) internal successors, (13546), 5405 states have internal predecessors, (13546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 13546 transitions. [2022-03-15 21:22:22,288 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 13546 transitions. Word has length 29 [2022-03-15 21:22:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:22,288 INFO L470 AbstractCegarLoop]: Abstraction has 5406 states and 13546 transitions. [2022-03-15 21:22:22,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) 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 21:22:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 13546 transitions. [2022-03-15 21:22:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:22,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:22,294 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:22,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-03-15 21:22:22,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:22,507 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1245442665, now seen corresponding path program 324 times [2022-03-15 21:22:22,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:22,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166087868] [2022-03-15 21:22:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:22,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:22,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:22,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166087868] [2022-03-15 21:22:22,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166087868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:22,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761303160] [2022-03-15 21:22:22,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:22:22,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:22,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:22,618 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:22,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-15 21:22:22,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:22:22,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:22,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:22,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:22,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:22,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761303160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:22,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:22,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 32 [2022-03-15 21:22:22,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [530163161] [2022-03-15 21:22:22,907 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:22,908 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:22,915 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:22,915 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:23,053 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3687440#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3687441#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3687442#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3687439#(< i2 (* 2 N)), 3687444#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 3687443#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:22:23,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:22:23,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:23,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:22:23,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:22:23,054 INFO L87 Difference]: Start difference. First operand 5406 states and 13546 transitions. Second operand has 25 states, 25 states have (on average 1.92) 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 21:22:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:23,410 INFO L93 Difference]: Finished difference Result 7016 states and 16703 transitions. [2022-03-15 21:22:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:22:23,410 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) 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 29 [2022-03-15 21:22:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:23,419 INFO L225 Difference]: With dead ends: 7016 [2022-03-15 21:22:23,419 INFO L226 Difference]: Without dead ends: 7010 [2022-03-15 21:22:23,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:22:23,420 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 184 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:23,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7010 states. [2022-03-15 21:22:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7010 to 5339. [2022-03-15 21:22:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5338 states have (on average 2.4975646309479207) internal successors, (13332), 5338 states have internal predecessors, (13332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 13332 transitions. [2022-03-15 21:22:23,486 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 13332 transitions. Word has length 29 [2022-03-15 21:22:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:23,486 INFO L470 AbstractCegarLoop]: Abstraction has 5339 states and 13332 transitions. [2022-03-15 21:22:23,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) 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 21:22:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 13332 transitions. [2022-03-15 21:22:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:23,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:23,491 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:23,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-03-15 21:22:23,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-03-15 21:22:23,693 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:23,693 INFO L85 PathProgramCache]: Analyzing trace with hash -93715229, now seen corresponding path program 325 times [2022-03-15 21:22:23,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:23,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140495578] [2022-03-15 21:22:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:23,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:23,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:23,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140495578] [2022-03-15 21:22:23,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140495578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:23,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111524194] [2022-03-15 21:22:23,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:22:23,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:23,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:23,778 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:23,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-15 21:22:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:23,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:24,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111524194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:24,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:24,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 20] total 31 [2022-03-15 21:22:24,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [786199312] [2022-03-15 21:22:24,023 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:24,025 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:24,031 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:24,031 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:24,156 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [3705393#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 3705389#(< i2 (* 2 N)), 3705392#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3705391#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3705390#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:22:24,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:22:24,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:22:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=856, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:22:24,156 INFO L87 Difference]: Start difference. First operand 5339 states and 13332 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 21:22:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:24,503 INFO L93 Difference]: Finished difference Result 6946 states and 16495 transitions. [2022-03-15 21:22:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:22:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 29 [2022-03-15 21:22:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:24,512 INFO L225 Difference]: With dead ends: 6946 [2022-03-15 21:22:24,512 INFO L226 Difference]: Without dead ends: 6941 [2022-03-15 21:22:24,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1302, Invalid=2604, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:22:24,513 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 115 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:24,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2022-03-15 21:22:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 5271. [2022-03-15 21:22:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5271 states, 5270 states have (on average 2.4889943074003793) internal successors, (13117), 5270 states have internal predecessors, (13117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5271 states to 5271 states and 13117 transitions. [2022-03-15 21:22:24,582 INFO L78 Accepts]: Start accepts. Automaton has 5271 states and 13117 transitions. Word has length 29 [2022-03-15 21:22:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:24,582 INFO L470 AbstractCegarLoop]: Abstraction has 5271 states and 13117 transitions. [2022-03-15 21:22:24,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 21:22:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5271 states and 13117 transitions. [2022-03-15 21:22:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:24,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:24,587 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:24,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:24,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:24,802 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash -414008535, now seen corresponding path program 326 times [2022-03-15 21:22:24,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:24,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780632068] [2022-03-15 21:22:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:24,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:24,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:24,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780632068] [2022-03-15 21:22:24,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780632068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:24,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274214024] [2022-03-15 21:22:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:22:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:24,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:24,898 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:24,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-15 21:22:24,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:22:24,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:24,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:24,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:24,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:25,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274214024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:25,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:25,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:22:25,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2039982578] [2022-03-15 21:22:25,143 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:25,144 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:25,151 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:25,151 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:25,234 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [3723135#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3723136#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3723137#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 3723134#(< i2 (* 2 N))] [2022-03-15 21:22:25,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:22:25,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:25,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:22:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=788, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:22:25,234 INFO L87 Difference]: Start difference. First operand 5271 states and 13117 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 21:22:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:25,525 INFO L93 Difference]: Finished difference Result 6788 states and 16089 transitions. [2022-03-15 21:22:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:22:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 29 [2022-03-15 21:22:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:25,534 INFO L225 Difference]: With dead ends: 6788 [2022-03-15 21:22:25,534 INFO L226 Difference]: Without dead ends: 6784 [2022-03-15 21:22:25,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1311, Invalid=2595, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:22:25,535 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 112 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:25,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6784 states. [2022-03-15 21:22:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6784 to 5201. [2022-03-15 21:22:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5201 states, 5200 states have (on average 2.480769230769231) internal successors, (12900), 5200 states have internal predecessors, (12900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5201 states to 5201 states and 12900 transitions. [2022-03-15 21:22:25,600 INFO L78 Accepts]: Start accepts. Automaton has 5201 states and 12900 transitions. Word has length 29 [2022-03-15 21:22:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:25,600 INFO L470 AbstractCegarLoop]: Abstraction has 5201 states and 12900 transitions. [2022-03-15 21:22:25,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 21:22:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 5201 states and 12900 transitions. [2022-03-15 21:22:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:25,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:25,605 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:25,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-03-15 21:22:25,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:25,811 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:25,812 INFO L85 PathProgramCache]: Analyzing trace with hash -285793245, now seen corresponding path program 327 times [2022-03-15 21:22:25,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:25,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857542418] [2022-03-15 21:22:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:25,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:25,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:25,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857542418] [2022-03-15 21:22:25,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857542418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:25,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2490580] [2022-03-15 21:22:25,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:22:25,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:25,903 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:25,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-15 21:22:25,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:22:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:25,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:22:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-15 21:22:26,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-03-15 21:22:26,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2490580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:26,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:26,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 4] total 30 [2022-03-15 21:22:26,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1583758579] [2022-03-15 21:22:26,222 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:26,224 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:26,230 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:26,230 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:26,383 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3740583#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 3740581#(< i2 (* 2 N)), 3740582#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:22:26,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:22:26,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:22:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:22:26,383 INFO L87 Difference]: Start difference. First operand 5201 states and 12900 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 21:22:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:26,866 INFO L93 Difference]: Finished difference Result 6547 states and 15493 transitions. [2022-03-15 21:22:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:22:26,867 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 29 [2022-03-15 21:22:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:26,877 INFO L225 Difference]: With dead ends: 6547 [2022-03-15 21:22:26,877 INFO L226 Difference]: Without dead ends: 6544 [2022-03-15 21:22:26,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=752, Invalid=3030, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:22:26,878 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 131 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:26,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6544 states. [2022-03-15 21:22:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6544 to 5200. [2022-03-15 21:22:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5200 states, 5199 states have (on average 2.4802846701288708) internal successors, (12895), 5199 states have internal predecessors, (12895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 12895 transitions. [2022-03-15 21:22:26,958 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 12895 transitions. Word has length 29 [2022-03-15 21:22:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:26,959 INFO L470 AbstractCegarLoop]: Abstraction has 5200 states and 12895 transitions. [2022-03-15 21:22:26,959 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 21:22:26,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 12895 transitions. [2022-03-15 21:22:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:26,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:26,963 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:26,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:27,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2022-03-15 21:22:27,179 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash 688174057, now seen corresponding path program 328 times [2022-03-15 21:22:27,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:27,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403391104] [2022-03-15 21:22:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:27,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:27,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:27,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403391104] [2022-03-15 21:22:27,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403391104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:27,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789433342] [2022-03-15 21:22:27,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:22:27,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:27,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:27,262 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:27,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-15 21:22:27,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:22:27,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:27,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:27,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789433342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:27,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:27,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:22:27,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [459499896] [2022-03-15 21:22:27,476 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:27,478 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:27,484 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:27,485 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:27,534 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3757787#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 3757786#(< i2 (* 2 N))] [2022-03-15 21:22:27,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:22:27,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:27,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:22:27,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=620, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:22:27,535 INFO L87 Difference]: Start difference. First operand 5200 states and 12895 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 21:22:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:27,760 INFO L93 Difference]: Finished difference Result 6312 states and 14995 transitions. [2022-03-15 21:22:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:22:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 29 [2022-03-15 21:22:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:27,768 INFO L225 Difference]: With dead ends: 6312 [2022-03-15 21:22:27,768 INFO L226 Difference]: Without dead ends: 6310 [2022-03-15 21:22:27,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1270, Invalid=2512, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:22:27,769 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 108 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:27,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2022-03-15 21:22:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 5200. [2022-03-15 21:22:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5200 states, 5199 states have (on average 2.479899980765532) internal successors, (12893), 5199 states have internal predecessors, (12893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 12893 transitions. [2022-03-15 21:22:27,831 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 12893 transitions. Word has length 29 [2022-03-15 21:22:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:27,831 INFO L470 AbstractCegarLoop]: Abstraction has 5200 states and 12893 transitions. [2022-03-15 21:22:27,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 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 21:22:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 12893 transitions. [2022-03-15 21:22:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:27,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:27,836 INFO L514 BasicCegarLoop]: trace histogram [12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:27,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:28,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:28,051 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1695143707, now seen corresponding path program 329 times [2022-03-15 21:22:28,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:28,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488725445] [2022-03-15 21:22:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:28,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:22:28,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:28,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488725445] [2022-03-15 21:22:28,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488725445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:28,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186577950] [2022-03-15 21:22:28,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:22:28,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:28,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:28,145 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:28,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-15 21:22:28,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:22:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:22:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:22:28,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 67 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:28,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186577950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:28,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:28,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22] total 33 [2022-03-15 21:22:28,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2130402161] [2022-03-15 21:22:28,343 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:28,345 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:28,354 INFO L252 McrAutomatonBuilder]: Finished intersection with 66 states and 101 transitions. [2022-03-15 21:22:28,354 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:28,755 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 24 new interpolants: [3774774#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 3774781#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 3774769#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 3774780#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3774766#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3774772#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11))), 3774765#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 3774782#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 7 i2))), 3774771#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 3774709#(<= (* 2 N) (+ 9 i2)), 3774773#(< i1 (* 2 N)), 3774761#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 3774770#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 3774767#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 3774762#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 3774777#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3774764#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 3774778#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 3774779#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 3774760#(< i2 (* 2 N)), 3774776#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 3774763#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 3774775#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 3774768#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N)))] [2022-03-15 21:22:28,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 21:22:28,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:28,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 21:22:28,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:22:28,756 INFO L87 Difference]: Start difference. First operand 5200 states and 12893 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:33,561 INFO L93 Difference]: Finished difference Result 8127 states and 18948 transitions. [2022-03-15 21:22:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-03-15 21:22:33,561 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:33,571 INFO L225 Difference]: With dead ends: 8127 [2022-03-15 21:22:33,571 INFO L226 Difference]: Without dead ends: 7862 [2022-03-15 21:22:33,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26035 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10666, Invalid=59824, Unknown=0, NotChecked=0, Total=70490 [2022-03-15 21:22:33,576 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 687 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 1425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1425 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:33,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 1 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1425 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:22:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7862 states. [2022-03-15 21:22:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7862 to 4859. [2022-03-15 21:22:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4859 states, 4858 states have (on average 2.5113215314944424) internal successors, (12200), 4858 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4859 states to 4859 states and 12200 transitions. [2022-03-15 21:22:33,641 INFO L78 Accepts]: Start accepts. Automaton has 4859 states and 12200 transitions. Word has length 29 [2022-03-15 21:22:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:33,641 INFO L470 AbstractCegarLoop]: Abstraction has 4859 states and 12200 transitions. [2022-03-15 21:22:33,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4859 states and 12200 transitions. [2022-03-15 21:22:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:33,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:33,646 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:33,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:33,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-03-15 21:22:33,861 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1497164957, now seen corresponding path program 330 times [2022-03-15 21:22:33,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:33,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351221940] [2022-03-15 21:22:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:33,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:33,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351221940] [2022-03-15 21:22:33,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351221940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:33,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225240930] [2022-03-15 21:22:33,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:22:33,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:33,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:33,922 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:33,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-15 21:22:33,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:22:33,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:33,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:33,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:34,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225240930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:34,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:34,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 29 [2022-03-15 21:22:34,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224894037] [2022-03-15 21:22:34,141 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:34,143 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:34,149 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:22:34,149 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:34,203 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3793244#(< i2 (* 2 N))] [2022-03-15 21:22:34,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:22:34,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:22:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=525, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:22:34,204 INFO L87 Difference]: Start difference. First operand 4859 states and 12200 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 21:22:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:34,472 INFO L93 Difference]: Finished difference Result 5713 states and 13915 transitions. [2022-03-15 21:22:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:22:34,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 29 [2022-03-15 21:22:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:34,479 INFO L225 Difference]: With dead ends: 5713 [2022-03-15 21:22:34,479 INFO L226 Difference]: Without dead ends: 5712 [2022-03-15 21:22:34,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1215, Invalid=2445, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:22:34,480 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 63 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:34,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5712 states. [2022-03-15 21:22:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5712 to 4955. [2022-03-15 21:22:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:34,561 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:34,561 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:34,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 21:22:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:34,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:34,566 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:34,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-03-15 21:22:34,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-03-15 21:22:34,771 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1995866297, now seen corresponding path program 331 times [2022-03-15 21:22:34,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:34,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704968596] [2022-03-15 21:22:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:34,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 57 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:34,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:34,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704968596] [2022-03-15 21:22:34,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704968596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:34,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995567428] [2022-03-15 21:22:34,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:22:34,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:34,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:34,859 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:34,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-15 21:22:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:34,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 57 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:34,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 57 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:35,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995567428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:35,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:35,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:22:35,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [46120701] [2022-03-15 21:22:35,180 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:35,182 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:35,189 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 57 transitions. [2022-03-15 21:22:35,189 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:35,287 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3809127#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:22:35,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:22:35,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:22:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=583, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:22:35,288 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 21:22:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:35,563 INFO L93 Difference]: Finished difference Result 5899 states and 14331 transitions. [2022-03-15 21:22:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:22:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 29 [2022-03-15 21:22:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:35,571 INFO L225 Difference]: With dead ends: 5899 [2022-03-15 21:22:35,571 INFO L226 Difference]: Without dead ends: 5899 [2022-03-15 21:22:35,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=972, Invalid=1890, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:22:35,571 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 101 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:35,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5899 states. [2022-03-15 21:22:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5899 to 4955. [2022-03-15 21:22:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:35,631 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:35,631 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:35,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 21:22:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:35,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:35,636 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:35,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:35,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:35,851 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1443794345, now seen corresponding path program 332 times [2022-03-15 21:22:35,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:35,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836357591] [2022-03-15 21:22:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:35,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:35,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:35,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836357591] [2022-03-15 21:22:35,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836357591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:35,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359852361] [2022-03-15 21:22:35,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:22:35,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:35,942 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:35,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-15 21:22:35,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:22:35,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:36,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:36,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359852361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:36,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:36,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 19] total 30 [2022-03-15 21:22:36,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [207143369] [2022-03-15 21:22:36,189 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:36,190 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:36,197 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 61 transitions. [2022-03-15 21:22:36,198 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:36,280 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3825180#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3825181#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:22:36,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:22:36,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:22:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=666, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:22:36,281 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 21:22:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:36,528 INFO L93 Difference]: Finished difference Result 6042 states and 14626 transitions. [2022-03-15 21:22:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:22:36,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 29 [2022-03-15 21:22:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:36,535 INFO L225 Difference]: With dead ends: 6042 [2022-03-15 21:22:36,535 INFO L226 Difference]: Without dead ends: 6042 [2022-03-15 21:22:36,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1215, Invalid=2691, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:22:36,536 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:36,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2022-03-15 21:22:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 4955. [2022-03-15 21:22:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:36,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:36,592 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:36,592 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:36,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 21:22:36,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:36,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:36,597 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:36,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-03-15 21:22:36,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-03-15 21:22:36,811 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:36,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash 699091847, now seen corresponding path program 333 times [2022-03-15 21:22:36,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:36,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399039278] [2022-03-15 21:22:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:36,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:36,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399039278] [2022-03-15 21:22:36,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399039278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:36,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084652619] [2022-03-15 21:22:36,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:22:36,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:36,878 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:36,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-15 21:22:36,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:22:36,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:36,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 59 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:37,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084652619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:37,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:37,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 31 [2022-03-15 21:22:37,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [51525386] [2022-03-15 21:22:37,144 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:37,145 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:37,153 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 65 transitions. [2022-03-15 21:22:37,153 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:37,256 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3841394#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3841396#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3841395#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:22:37,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:22:37,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:37,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:22:37,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:22:37,257 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:22:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:37,617 INFO L93 Difference]: Finished difference Result 6108 states and 14756 transitions. [2022-03-15 21:22:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:22:37,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 29 [2022-03-15 21:22:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:37,625 INFO L225 Difference]: With dead ends: 6108 [2022-03-15 21:22:37,625 INFO L226 Difference]: Without dead ends: 6108 [2022-03-15 21:22:37,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1648, Invalid=4204, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:22:37,626 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 137 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:37,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2022-03-15 21:22:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 4955. [2022-03-15 21:22:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:37,687 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:37,687 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:37,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:22:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:37,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:37,692 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:37,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-03-15 21:22:37,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2022-03-15 21:22:37,908 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash -911849111, now seen corresponding path program 334 times [2022-03-15 21:22:37,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:37,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016294854] [2022-03-15 21:22:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:37,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:38,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:38,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016294854] [2022-03-15 21:22:38,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016294854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:38,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811510682] [2022-03-15 21:22:38,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:22:38,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:38,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:38,002 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:38,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-15 21:22:38,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:22:38,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:38,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:38,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:38,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:38,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811510682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:38,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:38,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 20] total 31 [2022-03-15 21:22:38,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [847725944] [2022-03-15 21:22:38,326 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:38,328 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:38,335 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 69 transitions. [2022-03-15 21:22:38,335 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:38,529 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [3857700#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3857702#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3857701#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3857699#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:22:38,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:22:38,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:22:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=874, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:22:38,530 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 21:22:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:39,114 INFO L93 Difference]: Finished difference Result 6064 states and 14660 transitions. [2022-03-15 21:22:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 21:22:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:39,122 INFO L225 Difference]: With dead ends: 6064 [2022-03-15 21:22:39,122 INFO L226 Difference]: Without dead ends: 6064 [2022-03-15 21:22:39,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1783, Invalid=4537, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:22:39,123 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 154 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:39,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2022-03-15 21:22:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 4955. [2022-03-15 21:22:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:39,186 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:39,186 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:39,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 21:22:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:39,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:39,191 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:39,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:39,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-03-15 21:22:39,407 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:39,407 INFO L85 PathProgramCache]: Analyzing trace with hash 688588743, now seen corresponding path program 335 times [2022-03-15 21:22:39,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:39,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034655606] [2022-03-15 21:22:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:39,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 61 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:39,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:39,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034655606] [2022-03-15 21:22:39,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034655606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:39,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941040910] [2022-03-15 21:22:39,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:22:39,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:39,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:39,509 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:39,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-15 21:22:39,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:22:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 61 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:39,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 61 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:39,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941040910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:39,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:39,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 32 [2022-03-15 21:22:39,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1650936402] [2022-03-15 21:22:39,821 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:39,823 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:39,831 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 73 transitions. [2022-03-15 21:22:39,831 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:40,016 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [3873970#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3873968#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3873966#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3873967#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3873969#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:22:40,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:22:40,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:22:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:22:40,016 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 21:22:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:40,740 INFO L93 Difference]: Finished difference Result 6057 states and 14655 transitions. [2022-03-15 21:22:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 21:22:40,740 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 29 [2022-03-15 21:22:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:40,748 INFO L225 Difference]: With dead ends: 6057 [2022-03-15 21:22:40,748 INFO L226 Difference]: Without dead ends: 6057 [2022-03-15 21:22:40,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2340, Invalid=6590, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:22:40,749 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 200 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:40,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2022-03-15 21:22:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 4955. [2022-03-15 21:22:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:40,811 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:40,811 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:40,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 21:22:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:40,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:40,816 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:40,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-03-15 21:22:41,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-03-15 21:22:41,027 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:41,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1237445335, now seen corresponding path program 336 times [2022-03-15 21:22:41,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:41,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050897207] [2022-03-15 21:22:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:41,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 62 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:41,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:41,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050897207] [2022-03-15 21:22:41,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050897207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:41,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464454460] [2022-03-15 21:22:41,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:22:41,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:41,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:41,159 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:41,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-15 21:22:41,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:22:41,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:41,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:41,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 62 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:41,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 62 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:41,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464454460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:41,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:41,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 32 [2022-03-15 21:22:41,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1187588379] [2022-03-15 21:22:41,506 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:41,508 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:41,516 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 77 transitions. [2022-03-15 21:22:41,516 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:41,788 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3890255#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3890256#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3890258#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3890253#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3890254#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3890257#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:22:41,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:22:41,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:41,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:22:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1091, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:22:41,789 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:42,713 INFO L93 Difference]: Finished difference Result 5910 states and 14348 transitions. [2022-03-15 21:22:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 21:22:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:42,721 INFO L225 Difference]: With dead ends: 5910 [2022-03-15 21:22:42,721 INFO L226 Difference]: Without dead ends: 5910 [2022-03-15 21:22:42,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2291, Invalid=6451, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 21:22:42,722 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 221 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:42,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2022-03-15 21:22:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 4955. [2022-03-15 21:22:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:42,820 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:42,820 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:42,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:42,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:42,826 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:42,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:43,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:43,028 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash -814959609, now seen corresponding path program 337 times [2022-03-15 21:22:43,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:43,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875410833] [2022-03-15 21:22:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:43,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:43,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:43,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875410833] [2022-03-15 21:22:43,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875410833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:43,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139008655] [2022-03-15 21:22:43,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:22:43,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:43,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:43,172 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:43,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-15 21:22:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:43,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:43,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:43,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139008655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:43,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:43,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 33 [2022-03-15 21:22:43,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2070353816] [2022-03-15 21:22:43,468 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:43,470 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:43,478 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 81 transitions. [2022-03-15 21:22:43,478 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:43,740 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [3906396#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3906397#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 3906394#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3906395#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3906391#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3906393#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3906392#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:22:43,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:22:43,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:22:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:22:43,740 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:44,891 INFO L93 Difference]: Finished difference Result 5950 states and 14494 transitions. [2022-03-15 21:22:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 21:22:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:44,899 INFO L225 Difference]: With dead ends: 5950 [2022-03-15 21:22:44,899 INFO L226 Difference]: Without dead ends: 5950 [2022-03-15 21:22:44,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4222 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2946, Invalid=8826, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 21:22:44,901 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 219 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:44,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:22:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2022-03-15 21:22:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 4955. [2022-03-15 21:22:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:44,961 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:44,961 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:44,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:44,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:44,967 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:44,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:45,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:45,182 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash -602803991, now seen corresponding path program 338 times [2022-03-15 21:22:45,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:45,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100513635] [2022-03-15 21:22:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:45,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 64 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:45,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:45,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100513635] [2022-03-15 21:22:45,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100513635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:45,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460343399] [2022-03-15 21:22:45,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:22:45,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:45,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:45,276 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:45,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-15 21:22:45,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:22:45,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 64 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:45,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 64 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:45,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460343399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:45,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:45,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22] total 33 [2022-03-15 21:22:45,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1730559199] [2022-03-15 21:22:45,502 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:45,504 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:45,512 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 85 transitions. [2022-03-15 21:22:45,513 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:45,777 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [3922598#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3922602#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 3922600#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3922601#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3922599#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3922596#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3922597#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3922603#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2)))] [2022-03-15 21:22:45,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:22:45,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:45,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:22:45,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:22:45,778 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:46,607 INFO L93 Difference]: Finished difference Result 5752 states and 14092 transitions. [2022-03-15 21:22:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 21:22:46,607 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:46,615 INFO L225 Difference]: With dead ends: 5752 [2022-03-15 21:22:46,615 INFO L226 Difference]: Without dead ends: 5752 [2022-03-15 21:22:46,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3679 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2605, Invalid=8107, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 21:22:46,616 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 225 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:46,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5752 states. [2022-03-15 21:22:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5752 to 4955. [2022-03-15 21:22:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 2.5218005651998383) internal successors, (12493), 4954 states have internal predecessors, (12493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 12493 transitions. [2022-03-15 21:22:46,677 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 12493 transitions. Word has length 29 [2022-03-15 21:22:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:46,677 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 12493 transitions. [2022-03-15 21:22:46,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 12493 transitions. [2022-03-15 21:22:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:46,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:46,682 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:46,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-03-15 21:22:46,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:46,898 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:46,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1679052871, now seen corresponding path program 339 times [2022-03-15 21:22:46,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:46,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024173330] [2022-03-15 21:22:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:46,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 65 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:46,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:46,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024173330] [2022-03-15 21:22:46,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024173330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:46,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284103972] [2022-03-15 21:22:46,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:22:46,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:46,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:46,998 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:46,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-15 21:22:47,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:22:47,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:47,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 65 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:47,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 65 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:47,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284103972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:47,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:47,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 34 [2022-03-15 21:22:47,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1469505096] [2022-03-15 21:22:47,217 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:47,219 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:47,228 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 89 transitions. [2022-03-15 21:22:47,228 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:47,474 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [3938599#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 3938601#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 3938596#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 3938594#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3938595#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3938597#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3938600#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 3938593#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3938598#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:22:47,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:22:47,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:22:47,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:22:47,475 INFO L87 Difference]: Start difference. First operand 4955 states and 12493 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:48,589 INFO L93 Difference]: Finished difference Result 5914 states and 14574 transitions. [2022-03-15 21:22:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 21:22:48,589 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:48,597 INFO L225 Difference]: With dead ends: 5914 [2022-03-15 21:22:48,597 INFO L226 Difference]: Without dead ends: 5914 [2022-03-15 21:22:48,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4873 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3296, Invalid=10510, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 21:22:48,598 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 205 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:48,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5914 states. [2022-03-15 21:22:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5914 to 4915. [2022-03-15 21:22:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 2.517094017094017) internal successors, (12369), 4914 states have internal predecessors, (12369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 12369 transitions. [2022-03-15 21:22:48,662 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 12369 transitions. Word has length 29 [2022-03-15 21:22:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:48,662 INFO L470 AbstractCegarLoop]: Abstraction has 4915 states and 12369 transitions. [2022-03-15 21:22:48,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 12369 transitions. [2022-03-15 21:22:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:22:48,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:48,667 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:48,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:48,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:48,884 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash -597828439, now seen corresponding path program 340 times [2022-03-15 21:22:48,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:48,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702554408] [2022-03-15 21:22:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:48,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:48,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:48,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702554408] [2022-03-15 21:22:48,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702554408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:48,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329104092] [2022-03-15 21:22:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:22:48,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:48,989 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:48,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-15 21:22:49,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:22:49,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:49,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:49,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:49,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329104092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:49,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:49,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 34 [2022-03-15 21:22:49,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [843891822] [2022-03-15 21:22:49,196 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:49,198 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:49,207 INFO L252 McrAutomatonBuilder]: Finished intersection with 64 states and 97 transitions. [2022-03-15 21:22:49,207 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:49,476 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [3954705#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 3954701#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 3954699#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 3954704#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 3954697#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 3954702#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 3954706#(or (<= (* 2 N) (+ 9 i2)) (<= (+ i2 11) (* 2 N))), 3954698#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 3954703#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 3954700#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:22:49,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:22:49,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:22:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1552, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:22:49,477 INFO L87 Difference]: Start difference. First operand 4915 states and 12369 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:50,646 INFO L93 Difference]: Finished difference Result 6085 states and 14884 transitions. [2022-03-15 21:22:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 21:22:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 21:22:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:50,654 INFO L225 Difference]: With dead ends: 6085 [2022-03-15 21:22:50,654 INFO L226 Difference]: Without dead ends: 6085 [2022-03-15 21:22:50,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3418, Invalid=10862, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 21:22:50,656 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 217 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:50,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 1 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2022-03-15 21:22:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 4906. [2022-03-15 21:22:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4905 states have (on average 2.5217125382262995) internal successors, (12369), 4905 states have internal predecessors, (12369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 12369 transitions. [2022-03-15 21:22:50,736 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 12369 transitions. Word has length 29 [2022-03-15 21:22:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:50,736 INFO L470 AbstractCegarLoop]: Abstraction has 4906 states and 12369 transitions. [2022-03-15 21:22:50,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 12369 transitions. [2022-03-15 21:22:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:22:50,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:50,741 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:50,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:50,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:50,947 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:50,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1113217080, now seen corresponding path program 341 times [2022-03-15 21:22:50,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:50,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400211943] [2022-03-15 21:22:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:50,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:51,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:51,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400211943] [2022-03-15 21:22:51,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400211943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:51,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289905563] [2022-03-15 21:22:51,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:22:51,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:51,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:51,092 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:51,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-15 21:22:51,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:22:51,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:22:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 78 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:51,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 78 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:51,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289905563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:51,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:51,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 40 [2022-03-15 21:22:51,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2142996178] [2022-03-15 21:22:51,360 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:51,361 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:51,368 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 55 transitions. [2022-03-15 21:22:51,368 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:51,567 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [3970976#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 3970981#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 3970984#(or (< i2 (* 2 N)) (<= (+ i1 10) (* 2 N))), 3970980#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 3970979#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 3970975#(< i2 (* 2 N)), 3970978#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 3970985#(or (<= (+ i1 11) (* 2 N)) (< i2 (* 2 N))), 3970983#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N))), 3970977#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 3970982#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N)))] [2022-03-15 21:22:51,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:22:51,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:22:51,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2018, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:22:51,568 INFO L87 Difference]: Start difference. First operand 4906 states and 12369 transitions. Second operand has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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 21:22:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:51,839 INFO L93 Difference]: Finished difference Result 5363 states and 13200 transitions. [2022-03-15 21:22:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:22:51,839 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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 31 [2022-03-15 21:22:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:51,847 INFO L225 Difference]: With dead ends: 5363 [2022-03-15 21:22:51,847 INFO L226 Difference]: Without dead ends: 5363 [2022-03-15 21:22:51,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1492, Invalid=3764, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:22:51,848 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 150 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:51,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5363 states. [2022-03-15 21:22:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5363 to 4957. [2022-03-15 21:22:51,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 2.5274414850686036) internal successors, (12526), 4956 states have internal predecessors, (12526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 12526 transitions. [2022-03-15 21:22:51,906 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 12526 transitions. Word has length 31 [2022-03-15 21:22:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:51,906 INFO L470 AbstractCegarLoop]: Abstraction has 4957 states and 12526 transitions. [2022-03-15 21:22:51,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5) internal successors, (54), 35 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 21:22:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 12526 transitions. [2022-03-15 21:22:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:22:51,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:51,912 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:51,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:52,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-03-15 21:22:52,127 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash -137368861, now seen corresponding path program 342 times [2022-03-15 21:22:52,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:52,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772453850] [2022-03-15 21:22:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:52,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:52,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:52,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772453850] [2022-03-15 21:22:52,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772453850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:52,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030336819] [2022-03-15 21:22:52,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:22:52,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:52,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:52,250 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:52,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-15 21:22:52,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:22:52,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:52,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:22:52,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:52,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:52,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030336819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:52,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:52,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 37 [2022-03-15 21:22:52,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1284242387] [2022-03-15 21:22:52,576 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:52,577 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:52,584 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:22:52,585 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:52,892 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [3986525#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 3986526#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 3986529#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 3986534#(or (<= (+ i1 11) (* 2 N)) (< i2 (* 2 N))), 3986527#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 3986524#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 3986523#(< i2 (* 2 N)), 3986533#(or (< i2 (* 2 N)) (<= (+ i1 10) (* 2 N))), 3986530#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 3986528#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 3986531#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 3986532#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N)))] [2022-03-15 21:22:52,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 21:22:52,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 21:22:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1868, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:22:52,892 INFO L87 Difference]: Start difference. First operand 4957 states and 12526 transitions. Second operand has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 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 21:22:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:53,198 INFO L93 Difference]: Finished difference Result 5196 states and 12846 transitions. [2022-03-15 21:22:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:22:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 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 31 [2022-03-15 21:22:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:53,205 INFO L225 Difference]: With dead ends: 5196 [2022-03-15 21:22:53,205 INFO L226 Difference]: Without dead ends: 5186 [2022-03-15 21:22:53,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1478, Invalid=3778, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:22:53,206 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 163 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:53,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2022-03-15 21:22:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 4921. [2022-03-15 21:22:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4921 states, 4920 states have (on average 2.521747967479675) internal successors, (12407), 4920 states have internal predecessors, (12407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4921 states to 4921 states and 12407 transitions. [2022-03-15 21:22:53,279 INFO L78 Accepts]: Start accepts. Automaton has 4921 states and 12407 transitions. Word has length 31 [2022-03-15 21:22:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:53,279 INFO L470 AbstractCegarLoop]: Abstraction has 4921 states and 12407 transitions. [2022-03-15 21:22:53,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 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 21:22:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4921 states and 12407 transitions. [2022-03-15 21:22:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:22:53,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:53,285 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:53,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-03-15 21:22:53,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-03-15 21:22:53,501 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash 119655651, now seen corresponding path program 343 times [2022-03-15 21:22:53,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:53,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375753805] [2022-03-15 21:22:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:53,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:53,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375753805] [2022-03-15 21:22:53,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375753805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:53,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788096408] [2022-03-15 21:22:53,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:22:53,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:53,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:53,596 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:53,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-15 21:22:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:22:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:53,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:53,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788096408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:53,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:53,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:22:53,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1601000938] [2022-03-15 21:22:53,942 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:53,944 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:53,950 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 39 transitions. [2022-03-15 21:22:53,950 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:53,993 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [4001833#(< i1 (* 2 N)), 4001834#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4001832#(< i2 (* 2 N))] [2022-03-15 21:22:53,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:22:53,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:22:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=761, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:22:53,994 INFO L87 Difference]: Start difference. First operand 4921 states and 12407 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:22:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:54,349 INFO L93 Difference]: Finished difference Result 5387 states and 13273 transitions. [2022-03-15 21:22:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 21:22:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 31 [2022-03-15 21:22:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:54,357 INFO L225 Difference]: With dead ends: 5387 [2022-03-15 21:22:54,357 INFO L226 Difference]: Without dead ends: 5381 [2022-03-15 21:22:54,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1543, Invalid=3569, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:22:54,358 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:54,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2022-03-15 21:22:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4909. [2022-03-15 21:22:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4908 states have (on average 2.519559902200489) internal successors, (12366), 4908 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 12366 transitions. [2022-03-15 21:22:54,416 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 12366 transitions. Word has length 31 [2022-03-15 21:22:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:54,416 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 12366 transitions. [2022-03-15 21:22:54,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:22:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 12366 transitions. [2022-03-15 21:22:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:22:54,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:54,421 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:54,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:54,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-03-15 21:22:54,635 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:54,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1931456151, now seen corresponding path program 344 times [2022-03-15 21:22:54,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:54,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688045476] [2022-03-15 21:22:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:54,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:54,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688045476] [2022-03-15 21:22:54,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688045476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:54,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993413294] [2022-03-15 21:22:54,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:22:54,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:54,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:54,727 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:54,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-03-15 21:22:54,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:22:54,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:54,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:22:54,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:54,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:55,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993413294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:55,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:55,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:22:55,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1940613243] [2022-03-15 21:22:55,053 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:55,055 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:55,061 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 43 transitions. [2022-03-15 21:22:55,061 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:55,122 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [4017325#(< i2 (* 2 N)), 4017326#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4017327#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:22:55,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:22:55,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:55,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:22:55,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=762, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:22:55,123 INFO L87 Difference]: Start difference. First operand 4909 states and 12366 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 21:22:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:56,036 INFO L93 Difference]: Finished difference Result 6286 states and 15097 transitions. [2022-03-15 21:22:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 21:22:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 31 [2022-03-15 21:22:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:56,045 INFO L225 Difference]: With dead ends: 6286 [2022-03-15 21:22:56,045 INFO L226 Difference]: Without dead ends: 6277 [2022-03-15 21:22:56,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2349, Invalid=6207, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 21:22:56,047 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 134 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:56,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:22:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2022-03-15 21:22:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 5102. [2022-03-15 21:22:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5102 states, 5101 states have (on average 2.5465594981376203) internal successors, (12990), 5101 states have internal predecessors, (12990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5102 states to 5102 states and 12990 transitions. [2022-03-15 21:22:56,127 INFO L78 Accepts]: Start accepts. Automaton has 5102 states and 12990 transitions. Word has length 31 [2022-03-15 21:22:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:56,127 INFO L470 AbstractCegarLoop]: Abstraction has 5102 states and 12990 transitions. [2022-03-15 21:22:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 21:22:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5102 states and 12990 transitions. [2022-03-15 21:22:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:22:56,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:56,132 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:56,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:56,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:56,343 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1540430749, now seen corresponding path program 345 times [2022-03-15 21:22:56,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:56,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951973502] [2022-03-15 21:22:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:22:56,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:56,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951973502] [2022-03-15 21:22:56,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951973502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:56,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849759199] [2022-03-15 21:22:56,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:22:56,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:56,434 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:56,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-03-15 21:22:56,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:22:56,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:22:56,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:22:56,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:22:56,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849759199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:56,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:56,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:22:56,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [105454799] [2022-03-15 21:22:56,792 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:56,794 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:56,800 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:22:56,800 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:56,825 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4034144#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4034143#(< i2 (* 2 N))] [2022-03-15 21:22:56,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:22:56,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:22:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:22:56,825 INFO L87 Difference]: Start difference. First operand 5102 states and 12990 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:22:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:57,061 INFO L93 Difference]: Finished difference Result 6716 states and 16244 transitions. [2022-03-15 21:22:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:22:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:22:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:57,071 INFO L225 Difference]: With dead ends: 6716 [2022-03-15 21:22:57,071 INFO L226 Difference]: Without dead ends: 6714 [2022-03-15 21:22:57,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=860, Invalid=1492, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:22:57,071 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 107 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:57,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:22:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6714 states. [2022-03-15 21:22:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6714 to 5226. [2022-03-15 21:22:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 5225 states have (on average 2.560574162679426) internal successors, (13379), 5225 states have internal predecessors, (13379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 13379 transitions. [2022-03-15 21:22:57,140 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 13379 transitions. Word has length 31 [2022-03-15 21:22:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 5226 states and 13379 transitions. [2022-03-15 21:22:57,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:22:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 13379 transitions. [2022-03-15 21:22:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:22:57,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:57,145 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:57,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:57,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:57,361 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:57,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1974540516, now seen corresponding path program 346 times [2022-03-15 21:22:57,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:57,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483538882] [2022-03-15 21:22:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:57,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:22:57,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:57,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483538882] [2022-03-15 21:22:57,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483538882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:57,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039471240] [2022-03-15 21:22:57,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:22:57,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:57,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:57,439 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:57,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-03-15 21:22:57,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:22:57,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:22:57,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 69 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:22:57,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 69 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:22:57,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039471240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:57,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:57,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 18] total 30 [2022-03-15 21:22:57,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2014293781] [2022-03-15 21:22:57,728 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:57,730 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:57,737 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 51 transitions. [2022-03-15 21:22:57,737 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:57,859 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [4051557#(< i2 (* 2 N)), 4051558#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4051560#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4051563#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 4051562#(<= (* 2 N) (+ i2 1)), 4051561#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4051556#(< i1 (* 2 N)), 4051559#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:22:57,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:22:57,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:22:57,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1023, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:22:57,860 INFO L87 Difference]: Start difference. First operand 5226 states and 13379 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:22:58,521 INFO L93 Difference]: Finished difference Result 6306 states and 15394 transitions. [2022-03-15 21:22:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 21:22:58,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:22:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:22:58,531 INFO L225 Difference]: With dead ends: 6306 [2022-03-15 21:22:58,531 INFO L226 Difference]: Without dead ends: 6278 [2022-03-15 21:22:58,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1995, Invalid=6377, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 21:22:58,532 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 114 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:22:58,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:22:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2022-03-15 21:22:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 5205. [2022-03-15 21:22:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5205 states, 5204 states have (on average 2.5551498847040737) internal successors, (13297), 5204 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5205 states to 5205 states and 13297 transitions. [2022-03-15 21:22:58,600 INFO L78 Accepts]: Start accepts. Automaton has 5205 states and 13297 transitions. Word has length 31 [2022-03-15 21:22:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:22:58,600 INFO L470 AbstractCegarLoop]: Abstraction has 5205 states and 13297 transitions. [2022-03-15 21:22:58,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:22:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 5205 states and 13297 transitions. [2022-03-15 21:22:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:22:58,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:22:58,626 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:22:58,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-03-15 21:22:58,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-03-15 21:22:58,841 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:22:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:22:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash 655826055, now seen corresponding path program 347 times [2022-03-15 21:22:58,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:22:58,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252641934] [2022-03-15 21:22:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:22:58,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:22:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:22:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 39 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:58,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:22:58,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252641934] [2022-03-15 21:22:58,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252641934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:22:58,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915349495] [2022-03-15 21:22:58,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:22:58,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:22:58,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:22:58,940 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:22:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-03-15 21:22:58,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:22:58,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:22:58,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:22:58,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:22:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 39 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:22:59,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:22:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 39 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:22:59,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915349495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:22:59,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:22:59,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:22:59,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [808367784] [2022-03-15 21:22:59,303 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:22:59,305 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:22:59,312 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 47 transitions. [2022-03-15 21:22:59,312 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:22:59,412 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [4068600#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4068602#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4068601#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4068599#(< i2 (* 2 N))] [2022-03-15 21:22:59,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:22:59,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:22:59,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:22:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=832, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:22:59,413 INFO L87 Difference]: Start difference. First operand 5205 states and 13297 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 21:23:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:00,878 INFO L93 Difference]: Finished difference Result 7153 states and 17088 transitions. [2022-03-15 21:23:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 21:23:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 31 [2022-03-15 21:23:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:00,889 INFO L225 Difference]: With dead ends: 7153 [2022-03-15 21:23:00,889 INFO L226 Difference]: Without dead ends: 7130 [2022-03-15 21:23:00,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4808 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3260, Invalid=10080, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 21:23:00,891 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 150 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:00,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:23:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7130 states. [2022-03-15 21:23:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7130 to 5390. [2022-03-15 21:23:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5390 states, 5389 states have (on average 2.5802560771942846) internal successors, (13905), 5389 states have internal predecessors, (13905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5390 states to 5390 states and 13905 transitions. [2022-03-15 21:23:00,959 INFO L78 Accepts]: Start accepts. Automaton has 5390 states and 13905 transitions. Word has length 31 [2022-03-15 21:23:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:00,959 INFO L470 AbstractCegarLoop]: Abstraction has 5390 states and 13905 transitions. [2022-03-15 21:23:00,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 21:23:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states and 13905 transitions. [2022-03-15 21:23:00,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:00,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:00,965 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:00,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:01,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-03-15 21:23:01,179 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1328120029, now seen corresponding path program 348 times [2022-03-15 21:23:01,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:01,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771682650] [2022-03-15 21:23:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 35 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:01,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:01,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771682650] [2022-03-15 21:23:01,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771682650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:01,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532421642] [2022-03-15 21:23:01,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:23:01,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:01,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:01,271 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:01,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-03-15 21:23:01,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:23:01,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 35 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:01,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 35 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:01,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532421642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:01,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:01,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:23:01,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2016326268] [2022-03-15 21:23:01,630 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:01,632 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:01,638 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:23:01,638 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:01,668 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4086906#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4086905#(< i2 (* 2 N))] [2022-03-15 21:23:01,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:23:01,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:01,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:23:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:23:01,669 INFO L87 Difference]: Start difference. First operand 5390 states and 13905 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:01,920 INFO L93 Difference]: Finished difference Result 7365 states and 17869 transitions. [2022-03-15 21:23:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:23:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:23:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:01,931 INFO L225 Difference]: With dead ends: 7365 [2022-03-15 21:23:01,931 INFO L226 Difference]: Without dead ends: 7363 [2022-03-15 21:23:01,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=811, Invalid=1351, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:23:01,931 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 113 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:01,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:23:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7363 states. [2022-03-15 21:23:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7363 to 5496. [2022-03-15 21:23:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 2.594358507734304) internal successors, (14256), 5495 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 14256 transitions. [2022-03-15 21:23:02,018 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 14256 transitions. Word has length 31 [2022-03-15 21:23:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:02,018 INFO L470 AbstractCegarLoop]: Abstraction has 5496 states and 14256 transitions. [2022-03-15 21:23:02,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 14256 transitions. [2022-03-15 21:23:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:02,023 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:02,023 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:02,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:02,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:02,238 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:02,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1095653354, now seen corresponding path program 349 times [2022-03-15 21:23:02,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:02,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879658575] [2022-03-15 21:23:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:02,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:02,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:02,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879658575] [2022-03-15 21:23:02,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879658575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:02,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754951950] [2022-03-15 21:23:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:23:02,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:02,333 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-03-15 21:23:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:02,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:23:02,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 62 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:23:02,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 62 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:23:02,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754951950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:02,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:02,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 19] total 31 [2022-03-15 21:23:02,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [930822026] [2022-03-15 21:23:02,651 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:02,652 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:02,660 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 55 transitions. [2022-03-15 21:23:02,660 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:02,843 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [4105505#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 4105509#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4105504#(< i1 (* 2 N)), 4105507#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4105512#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 4105513#(<= (* 2 N) (+ 2 i2)), 4105510#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4105506#(< i2 (* 2 N)), 4105511#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4105508#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:23:02,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:23:02,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:02,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:23:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=497, Invalid=1225, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:23:02,844 INFO L87 Difference]: Start difference. First operand 5496 states and 14256 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) 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 21:23:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:03,980 INFO L93 Difference]: Finished difference Result 6941 states and 17053 transitions. [2022-03-15 21:23:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-15 21:23:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) 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 31 [2022-03-15 21:23:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:03,990 INFO L225 Difference]: With dead ends: 6941 [2022-03-15 21:23:03,990 INFO L226 Difference]: Without dead ends: 6899 [2022-03-15 21:23:03,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4968 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2856, Invalid=10716, Unknown=0, NotChecked=0, Total=13572 [2022-03-15 21:23:03,992 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 161 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:03,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 1 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:23:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2022-03-15 21:23:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 5477. [2022-03-15 21:23:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5477 states, 5476 states have (on average 2.5891161431701972) internal successors, (14178), 5476 states have internal predecessors, (14178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 14178 transitions. [2022-03-15 21:23:04,063 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 14178 transitions. Word has length 31 [2022-03-15 21:23:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:04,063 INFO L470 AbstractCegarLoop]: Abstraction has 5477 states and 14178 transitions. [2022-03-15 21:23:04,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) 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 21:23:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 14178 transitions. [2022-03-15 21:23:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:04,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:04,069 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:04,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-03-15 21:23:04,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:04,284 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:04,285 INFO L85 PathProgramCache]: Analyzing trace with hash -742804183, now seen corresponding path program 350 times [2022-03-15 21:23:04,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:04,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247184023] [2022-03-15 21:23:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:04,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:04,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:04,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247184023] [2022-03-15 21:23:04,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247184023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:04,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856458209] [2022-03-15 21:23:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:23:04,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:04,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:04,350 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:04,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-03-15 21:23:04,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:23:04,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:04,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:04,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:23:04,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856458209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:04,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:04,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:23:04,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [405779654] [2022-03-15 21:23:04,675 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:04,676 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:04,683 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 51 transitions. [2022-03-15 21:23:04,683 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:04,779 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [4123772#(< i2 (* 2 N)), 4123776#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4123773#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4123774#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4123775#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:23:04,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:23:04,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:23:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=904, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:23:04,780 INFO L87 Difference]: Start difference. First operand 5477 states and 14178 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 21:23:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:06,022 INFO L93 Difference]: Finished difference Result 7785 states and 18608 transitions. [2022-03-15 21:23:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 21:23:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 31 [2022-03-15 21:23:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:06,033 INFO L225 Difference]: With dead ends: 7785 [2022-03-15 21:23:06,033 INFO L226 Difference]: Without dead ends: 7748 [2022-03-15 21:23:06,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5861 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3976, Invalid=12280, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 21:23:06,035 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 178 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:06,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:23:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7748 states. [2022-03-15 21:23:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7748 to 5669. [2022-03-15 21:23:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5669 states, 5668 states have (on average 2.609738884968243) internal successors, (14792), 5668 states have internal predecessors, (14792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5669 states to 5669 states and 14792 transitions. [2022-03-15 21:23:06,113 INFO L78 Accepts]: Start accepts. Automaton has 5669 states and 14792 transitions. Word has length 31 [2022-03-15 21:23:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:06,113 INFO L470 AbstractCegarLoop]: Abstraction has 5669 states and 14792 transitions. [2022-03-15 21:23:06,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 21:23:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5669 states and 14792 transitions. [2022-03-15 21:23:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:06,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:06,119 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:06,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:06,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:06,331 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash 958544995, now seen corresponding path program 351 times [2022-03-15 21:23:06,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:06,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396457178] [2022-03-15 21:23:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:06,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:06,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:06,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396457178] [2022-03-15 21:23:06,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396457178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:06,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785620932] [2022-03-15 21:23:06,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:23:06,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:06,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:06,406 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:06,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-03-15 21:23:06,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-15 21:23:06,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:06,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:06,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785620932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:06,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:06,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:23:06,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [653076920] [2022-03-15 21:23:06,676 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:06,678 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:06,684 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:23:06,684 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:06,706 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4143292#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4143291#(< i2 (* 2 N))] [2022-03-15 21:23:06,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:23:06,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:06,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:23:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:23:06,707 INFO L87 Difference]: Start difference. First operand 5669 states and 14792 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:06,874 INFO L93 Difference]: Finished difference Result 7836 states and 19136 transitions. [2022-03-15 21:23:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:23:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:23:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:06,885 INFO L225 Difference]: With dead ends: 7836 [2022-03-15 21:23:06,885 INFO L226 Difference]: Without dead ends: 7834 [2022-03-15 21:23:06,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=760, Invalid=1220, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:23:06,886 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 117 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:06,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:23:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7834 states. [2022-03-15 21:23:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7834 to 5765. [2022-03-15 21:23:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5765 states, 5764 states have (on average 2.6219639139486466) internal successors, (15113), 5764 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 15113 transitions. [2022-03-15 21:23:06,966 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 15113 transitions. Word has length 31 [2022-03-15 21:23:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:06,966 INFO L470 AbstractCegarLoop]: Abstraction has 5765 states and 15113 transitions. [2022-03-15 21:23:06,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 15113 transitions. [2022-03-15 21:23:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:06,972 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:06,972 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:06,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:07,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-03-15 21:23:07,177 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:07,178 INFO L85 PathProgramCache]: Analyzing trace with hash -380044892, now seen corresponding path program 352 times [2022-03-15 21:23:07,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:07,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197803085] [2022-03-15 21:23:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:07,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 51 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:07,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:07,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197803085] [2022-03-15 21:23:07,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197803085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:07,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944572871] [2022-03-15 21:23:07,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:23:07,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:07,270 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:07,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-03-15 21:23:07,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:23:07,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:07,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:23:07,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 57 proven. 85 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:23:07,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 57 proven. 86 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:23:07,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944572871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:07,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:07,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 20] total 32 [2022-03-15 21:23:07,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [195244852] [2022-03-15 21:23:07,587 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:07,589 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:07,597 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 59 transitions. [2022-03-15 21:23:07,597 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:07,748 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [4162905#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 4162899#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4162901#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4162902#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4162900#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4162907#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 4162903#(< i1 (* 2 N)), 4162896#(< i2 (* 2 N)), 4162897#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4162898#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4162906#(<= (* 2 N) (+ 3 i2)), 4162904#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2))] [2022-03-15 21:23:07,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:23:07,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:23:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:23:07,748 INFO L87 Difference]: Start difference. First operand 5765 states and 15113 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) 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 21:23:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:08,688 INFO L93 Difference]: Finished difference Result 7383 states and 18259 transitions. [2022-03-15 21:23:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 21:23:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) 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 31 [2022-03-15 21:23:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:08,698 INFO L225 Difference]: With dead ends: 7383 [2022-03-15 21:23:08,699 INFO L226 Difference]: Without dead ends: 7333 [2022-03-15 21:23:08,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5487 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3162, Invalid=12090, Unknown=0, NotChecked=0, Total=15252 [2022-03-15 21:23:08,700 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 188 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:08,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:23:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7333 states. [2022-03-15 21:23:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7333 to 5750. [2022-03-15 21:23:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 2.617324752130805) internal successors, (15047), 5749 states have internal predecessors, (15047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 15047 transitions. [2022-03-15 21:23:08,775 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 15047 transitions. Word has length 31 [2022-03-15 21:23:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:08,775 INFO L470 AbstractCegarLoop]: Abstraction has 5750 states and 15047 transitions. [2022-03-15 21:23:08,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) 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 21:23:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 15047 transitions. [2022-03-15 21:23:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:08,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:08,781 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:08,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:08,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-03-15 21:23:08,995 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1150668601, now seen corresponding path program 353 times [2022-03-15 21:23:08,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:08,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496531126] [2022-03-15 21:23:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:09,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:09,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496531126] [2022-03-15 21:23:09,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496531126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:09,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893701303] [2022-03-15 21:23:09,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:23:09,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:09,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:09,080 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:09,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-03-15 21:23:09,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-15 21:23:09,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:09,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:09,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:09,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:23:09,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893701303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:09,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:09,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:23:09,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760588977] [2022-03-15 21:23:09,432 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:09,434 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:09,441 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 55 transitions. [2022-03-15 21:23:09,441 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:09,560 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [4182163#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4182167#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4182164#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4182166#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4182162#(< i2 (* 2 N)), 4182165#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:23:09,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:23:09,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:23:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=978, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:23:09,561 INFO L87 Difference]: Start difference. First operand 5750 states and 15047 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 21:23:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:11,633 INFO L93 Difference]: Finished difference Result 8491 states and 20321 transitions. [2022-03-15 21:23:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-15 21:23:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 31 [2022-03-15 21:23:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:11,645 INFO L225 Difference]: With dead ends: 8491 [2022-03-15 21:23:11,645 INFO L226 Difference]: Without dead ends: 8438 [2022-03-15 21:23:11,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9744 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5671, Invalid=20089, Unknown=0, NotChecked=0, Total=25760 [2022-03-15 21:23:11,648 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 212 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:11,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:23:11,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8438 states. [2022-03-15 21:23:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8438 to 5947. [2022-03-15 21:23:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5947 states, 5946 states have (on average 2.6331987891019173) internal successors, (15657), 5946 states have internal predecessors, (15657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5947 states to 5947 states and 15657 transitions. [2022-03-15 21:23:11,747 INFO L78 Accepts]: Start accepts. Automaton has 5947 states and 15657 transitions. Word has length 31 [2022-03-15 21:23:11,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:11,747 INFO L470 AbstractCegarLoop]: Abstraction has 5947 states and 15657 transitions. [2022-03-15 21:23:11,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 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 21:23:11,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5947 states and 15657 transitions. [2022-03-15 21:23:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:11,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:11,753 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:11,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:11,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-03-15 21:23:11,967 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:11,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1169283293, now seen corresponding path program 354 times [2022-03-15 21:23:11,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:11,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950337610] [2022-03-15 21:23:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:11,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:12,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:12,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950337610] [2022-03-15 21:23:12,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950337610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:12,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393028524] [2022-03-15 21:23:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:23:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:12,047 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:12,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-03-15 21:23:12,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 21:23:12,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:12,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:12,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393028524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:12,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:12,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:23:12,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2104862188] [2022-03-15 21:23:12,373 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:12,375 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:12,381 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:23:12,381 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:12,408 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4203008#(< i2 (* 2 N)), 4203009#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:23:12,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:23:12,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:23:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:23:12,409 INFO L87 Difference]: Start difference. First operand 5947 states and 15657 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:12,610 INFO L93 Difference]: Finished difference Result 8190 states and 20123 transitions. [2022-03-15 21:23:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:23:12,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:23:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:12,621 INFO L225 Difference]: With dead ends: 8190 [2022-03-15 21:23:12,622 INFO L226 Difference]: Without dead ends: 8188 [2022-03-15 21:23:12,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=707, Invalid=1099, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:23:12,622 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 131 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:12,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:23:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2022-03-15 21:23:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 6033. [2022-03-15 21:23:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6033 states, 6032 states have (on average 2.6438992042440317) internal successors, (15948), 6032 states have internal predecessors, (15948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 15948 transitions. [2022-03-15 21:23:12,702 INFO L78 Accepts]: Start accepts. Automaton has 6033 states and 15948 transitions. Word has length 31 [2022-03-15 21:23:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:12,702 INFO L470 AbstractCegarLoop]: Abstraction has 6033 states and 15948 transitions. [2022-03-15 21:23:12,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6033 states and 15948 transitions. [2022-03-15 21:23:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:12,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:12,708 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:12,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:12,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-03-15 21:23:12,919 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:12,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:12,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1117949738, now seen corresponding path program 355 times [2022-03-15 21:23:12,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:12,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340847346] [2022-03-15 21:23:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 49 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:13,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:13,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340847346] [2022-03-15 21:23:13,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340847346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:13,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806861752] [2022-03-15 21:23:13,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:23:13,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:13,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:13,023 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:13,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-03-15 21:23:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:13,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:23:13,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 54 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:23:13,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 54 proven. 89 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:23:13,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806861752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:13,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:13,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 20] total 32 [2022-03-15 21:23:13,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1418578959] [2022-03-15 21:23:13,340 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:13,342 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:13,350 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 63 transitions. [2022-03-15 21:23:13,350 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:13,623 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [4223509#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 4223501#(< i1 (* 2 N)), 4223503#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 4223499#(< i2 (* 2 N)), 4223512#(<= (* 2 N) (+ i2 4)), 4223506#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4223500#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4223507#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4223511#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4223504#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4223505#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4223508#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 4223510#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4223502#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2))] [2022-03-15 21:23:13,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:23:13,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:23:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:23:13,624 INFO L87 Difference]: Start difference. First operand 6033 states and 15948 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 21:23:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:15,979 INFO L93 Difference]: Finished difference Result 7989 states and 19894 transitions. [2022-03-15 21:23:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-15 21:23:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 31 [2022-03-15 21:23:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:15,990 INFO L225 Difference]: With dead ends: 7989 [2022-03-15 21:23:15,991 INFO L226 Difference]: Without dead ends: 7917 [2022-03-15 21:23:15,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9640 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4769, Invalid=21313, Unknown=0, NotChecked=0, Total=26082 [2022-03-15 21:23:15,994 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 252 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:15,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:23:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7917 states. [2022-03-15 21:23:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7917 to 6020. [2022-03-15 21:23:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6020 states, 6019 states have (on average 2.639308855291577) internal successors, (15886), 6019 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6020 states to 6020 states and 15886 transitions. [2022-03-15 21:23:16,073 INFO L78 Accepts]: Start accepts. Automaton has 6020 states and 15886 transitions. Word has length 31 [2022-03-15 21:23:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:16,073 INFO L470 AbstractCegarLoop]: Abstraction has 6020 states and 15886 transitions. [2022-03-15 21:23:16,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 21:23:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6020 states and 15886 transitions. [2022-03-15 21:23:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:16,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:16,079 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:16,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-03-15 21:23:16,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:16,279 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -909563671, now seen corresponding path program 356 times [2022-03-15 21:23:16,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:16,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548324230] [2022-03-15 21:23:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:16,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 30 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:16,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:16,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548324230] [2022-03-15 21:23:16,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548324230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:16,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784452345] [2022-03-15 21:23:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:23:16,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:16,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:16,362 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:16,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-03-15 21:23:16,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:23:16,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:16,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 30 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:16,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 30 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:23:16,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784452345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:16,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:16,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:23:16,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1044468181] [2022-03-15 21:23:16,720 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:16,721 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:16,729 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 59 transitions. [2022-03-15 21:23:16,729 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:16,867 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [4243987#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4243990#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4243985#(< i2 (* 2 N)), 4243991#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4243989#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4243986#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4243988#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:23:16,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:23:16,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:23:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1054, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:23:16,874 INFO L87 Difference]: Start difference. First operand 6020 states and 15886 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 21:23:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:19,226 INFO L93 Difference]: Finished difference Result 9074 states and 21702 transitions. [2022-03-15 21:23:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-15 21:23:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 31 [2022-03-15 21:23:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:19,239 INFO L225 Difference]: With dead ends: 9074 [2022-03-15 21:23:19,239 INFO L226 Difference]: Without dead ends: 9003 [2022-03-15 21:23:19,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6560, Invalid=23542, Unknown=0, NotChecked=0, Total=30102 [2022-03-15 21:23:19,243 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 252 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:19,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:23:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9003 states. [2022-03-15 21:23:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9003 to 6224. [2022-03-15 21:23:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 2.652257753495099) internal successors, (16505), 6223 states have internal predecessors, (16505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 16505 transitions. [2022-03-15 21:23:19,328 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 16505 transitions. Word has length 31 [2022-03-15 21:23:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:19,329 INFO L470 AbstractCegarLoop]: Abstraction has 6224 states and 16505 transitions. [2022-03-15 21:23:19,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 21:23:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 16505 transitions. [2022-03-15 21:23:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:19,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:19,334 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:19,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-03-15 21:23:19,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-03-15 21:23:19,547 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1587516515, now seen corresponding path program 357 times [2022-03-15 21:23:19,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:19,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488593596] [2022-03-15 21:23:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:19,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:19,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:19,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488593596] [2022-03-15 21:23:19,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488593596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:19,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436038281] [2022-03-15 21:23:19,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:23:19,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:19,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:19,618 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:19,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-03-15 21:23:19,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 21:23:19,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:19,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:19,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 32 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:19,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436038281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:19,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:19,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:23:19,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2046109971] [2022-03-15 21:23:19,933 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:19,935 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:19,941 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:23:19,941 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:19,964 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4265994#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4265993#(< i2 (* 2 N))] [2022-03-15 21:23:19,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:23:19,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:23:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:23:19,965 INFO L87 Difference]: Start difference. First operand 6224 states and 16505 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:20,133 INFO L93 Difference]: Finished difference Result 8409 states and 20817 transitions. [2022-03-15 21:23:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:23:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:23:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:20,144 INFO L225 Difference]: With dead ends: 8409 [2022-03-15 21:23:20,145 INFO L226 Difference]: Without dead ends: 8407 [2022-03-15 21:23:20,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=652, Invalid=988, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:23:20,145 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 108 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:20,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:23:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8407 states. [2022-03-15 21:23:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8407 to 6300. [2022-03-15 21:23:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 6299 states have (on average 2.6616923321162087) internal successors, (16766), 6299 states have internal predecessors, (16766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 16766 transitions. [2022-03-15 21:23:20,233 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 16766 transitions. Word has length 31 [2022-03-15 21:23:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:20,233 INFO L470 AbstractCegarLoop]: Abstraction has 6300 states and 16766 transitions. [2022-03-15 21:23:20,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 16766 transitions. [2022-03-15 21:23:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:20,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:20,239 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:20,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:20,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:20,455 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash 311143012, now seen corresponding path program 358 times [2022-03-15 21:23:20,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:20,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695110418] [2022-03-15 21:23:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:20,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 49 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:20,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:20,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695110418] [2022-03-15 21:23:20,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695110418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:20,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41236847] [2022-03-15 21:23:20,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:23:20,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:20,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:20,563 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:20,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-03-15 21:23:20,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:23:20,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:20,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:23:20,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 53 proven. 89 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:23:20,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 53 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:23:20,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41236847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:20,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:20,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 21] total 33 [2022-03-15 21:23:20,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [81358274] [2022-03-15 21:23:20,820 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:20,822 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:20,830 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 67 transitions. [2022-03-15 21:23:20,831 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:21,108 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [4287245#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4287248#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 4287246#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4287238#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 4287239#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 4287243#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4287234#(< i1 (* 2 N)), 4287247#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 4287235#(< i2 (* 2 N)), 4287236#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4287241#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4287240#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 4287237#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 4287249#(<= (* 2 N) (+ 5 i2)), 4287242#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4287244#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:23:21,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 21:23:21,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 21:23:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=1858, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:23:21,109 INFO L87 Difference]: Start difference. First operand 6300 states and 16766 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:23,669 INFO L93 Difference]: Finished difference Result 8318 states and 20817 transitions. [2022-03-15 21:23:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-15 21:23:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:23:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:23,681 INFO L225 Difference]: With dead ends: 8318 [2022-03-15 21:23:23,681 INFO L226 Difference]: Without dead ends: 8224 [2022-03-15 21:23:23,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10599 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5165, Invalid=23905, Unknown=0, NotChecked=0, Total=29070 [2022-03-15 21:23:23,683 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 278 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:23,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:23:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2022-03-15 21:23:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 6291. [2022-03-15 21:23:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6291 states, 6290 states have (on average 2.6573926868044517) internal successors, (16715), 6290 states have internal predecessors, (16715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6291 states to 6291 states and 16715 transitions. [2022-03-15 21:23:23,768 INFO L78 Accepts]: Start accepts. Automaton has 6291 states and 16715 transitions. Word has length 31 [2022-03-15 21:23:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:23,768 INFO L470 AbstractCegarLoop]: Abstraction has 6291 states and 16715 transitions. [2022-03-15 21:23:23,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6291 states and 16715 transitions. [2022-03-15 21:23:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:23,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:23,774 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:23,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:23,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:23,990 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2025245433, now seen corresponding path program 359 times [2022-03-15 21:23:23,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:23,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812542839] [2022-03-15 21:23:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:23,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:24,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:24,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812542839] [2022-03-15 21:23:24,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812542839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:24,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384104018] [2022-03-15 21:23:24,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:23:24,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:24,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:24,047 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:24,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-03-15 21:23:24,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:23:24,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:24,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:24,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:24,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:23:24,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384104018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:24,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:24,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:23:24,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1211597767] [2022-03-15 21:23:24,309 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:24,311 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:24,320 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 63 transitions. [2022-03-15 21:23:24,320 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:24,474 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [4308610#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4308612#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4308608#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4308609#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4308607#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4308605#(< i2 (* 2 N)), 4308606#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4308611#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:23:24,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:23:24,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:23:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=1132, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:23:24,475 INFO L87 Difference]: Start difference. First operand 6291 states and 16715 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 21:23:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:28,108 INFO L93 Difference]: Finished difference Result 9923 states and 23729 transitions. [2022-03-15 21:23:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2022-03-15 21:23:28,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 31 [2022-03-15 21:23:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:28,122 INFO L225 Difference]: With dead ends: 9923 [2022-03-15 21:23:28,122 INFO L226 Difference]: Without dead ends: 9832 [2022-03-15 21:23:28,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21841 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9602, Invalid=44920, Unknown=0, NotChecked=0, Total=54522 [2022-03-15 21:23:28,127 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 338 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:28,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:23:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9832 states. [2022-03-15 21:23:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9832 to 6498. [2022-03-15 21:23:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 6497 states have (on average 2.6666153609358165) internal successors, (17325), 6497 states have internal predecessors, (17325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 17325 transitions. [2022-03-15 21:23:28,229 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 17325 transitions. Word has length 31 [2022-03-15 21:23:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:28,229 INFO L470 AbstractCegarLoop]: Abstraction has 6498 states and 17325 transitions. [2022-03-15 21:23:28,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 21:23:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 17325 transitions. [2022-03-15 21:23:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:28,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:28,236 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:28,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-03-15 21:23:28,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:28,444 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1148964643, now seen corresponding path program 360 times [2022-03-15 21:23:28,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:28,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91212110] [2022-03-15 21:23:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 35 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:28,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:28,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91212110] [2022-03-15 21:23:28,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91212110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:28,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660124291] [2022-03-15 21:23:28,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:23:28,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:28,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:28,497 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:28,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-03-15 21:23:28,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 21:23:28,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:28,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 35 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:28,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 35 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:28,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660124291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:28,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:28,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:23:28,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [195086997] [2022-03-15 21:23:28,733 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:28,735 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:28,768 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:23:28,768 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:28,798 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4332129#(< i2 (* 2 N)), 4332130#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:23:28,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:23:28,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:23:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:23:28,799 INFO L87 Difference]: Start difference. First operand 6498 states and 17325 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:28,988 INFO L93 Difference]: Finished difference Result 8501 states and 21208 transitions. [2022-03-15 21:23:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:23:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:23:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:29,000 INFO L225 Difference]: With dead ends: 8501 [2022-03-15 21:23:29,001 INFO L226 Difference]: Without dead ends: 8499 [2022-03-15 21:23:29,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=595, Invalid=887, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:23:29,001 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 113 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:29,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:23:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8499 states. [2022-03-15 21:23:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8499 to 6564. [2022-03-15 21:23:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6564 states, 6563 states have (on average 2.674996190766418) internal successors, (17556), 6563 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6564 states to 6564 states and 17556 transitions. [2022-03-15 21:23:29,091 INFO L78 Accepts]: Start accepts. Automaton has 6564 states and 17556 transitions. Word has length 31 [2022-03-15 21:23:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:29,091 INFO L470 AbstractCegarLoop]: Abstraction has 6564 states and 17556 transitions. [2022-03-15 21:23:29,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6564 states and 17556 transitions. [2022-03-15 21:23:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:29,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:29,097 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:29,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:29,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:29,311 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:29,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1069938282, now seen corresponding path program 361 times [2022-03-15 21:23:29,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:29,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347270856] [2022-03-15 21:23:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:29,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 51 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:29,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:29,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347270856] [2022-03-15 21:23:29,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347270856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:29,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063827868] [2022-03-15 21:23:29,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:23:29,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:29,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:29,425 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:29,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-03-15 21:23:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:23:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 54 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:23:29,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 54 proven. 89 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:23:29,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063827868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:29,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:29,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 33 [2022-03-15 21:23:29,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [471277718] [2022-03-15 21:23:29,709 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:29,711 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:29,719 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 71 transitions. [2022-03-15 21:23:29,719 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:30,110 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 18 new interpolants: [4353997#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 4353986#(< i2 (* 2 N)), 4354003#(<= (* 2 N) (+ 6 i2)), 4353988#(< i1 (* 2 N)), 4353994#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4353996#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 4353987#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4353999#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 4354002#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 4353995#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 4353998#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 4354001#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 4353990#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4353993#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4354000#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 4353989#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4353991#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4353992#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:23:30,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 21:23:30,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:30,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 21:23:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=2046, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:23:30,111 INFO L87 Difference]: Start difference. First operand 6564 states and 17556 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:34,412 INFO L93 Difference]: Finished difference Result 9111 states and 22897 transitions. [2022-03-15 21:23:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-03-15 21:23:34,413 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:23:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:34,429 INFO L225 Difference]: With dead ends: 9111 [2022-03-15 21:23:34,429 INFO L226 Difference]: Without dead ends: 8963 [2022-03-15 21:23:34,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17752 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7555, Invalid=39317, Unknown=0, NotChecked=0, Total=46872 [2022-03-15 21:23:34,433 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 410 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:34,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:23:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8963 states. [2022-03-15 21:23:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8963 to 6557. [2022-03-15 21:23:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6557 states, 6556 states have (on average 2.6706833435021355) internal successors, (17509), 6556 states have internal predecessors, (17509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 17509 transitions. [2022-03-15 21:23:34,528 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 17509 transitions. Word has length 31 [2022-03-15 21:23:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:34,528 INFO L470 AbstractCegarLoop]: Abstraction has 6557 states and 17509 transitions. [2022-03-15 21:23:34,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 17509 transitions. [2022-03-15 21:23:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:34,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:34,534 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:34,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:34,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:34,750 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2043325609, now seen corresponding path program 362 times [2022-03-15 21:23:34,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:34,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408193658] [2022-03-15 21:23:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:34,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:34,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:34,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408193658] [2022-03-15 21:23:34,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408193658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:34,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68013401] [2022-03-15 21:23:34,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:23:34,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:34,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:34,833 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:34,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-03-15 21:23:34,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:23:34,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:34,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:34,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:34,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 34 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:23:35,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68013401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:35,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:35,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:23:35,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [785706900] [2022-03-15 21:23:35,185 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:35,187 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:35,195 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 67 transitions. [2022-03-15 21:23:35,195 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:35,451 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [4376772#(< i2 (* 2 N)), 4376777#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4376776#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4376774#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4376779#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4376778#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4376775#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4376773#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4376780#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N)))] [2022-03-15 21:23:35,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:23:35,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:35,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:23:35,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=1212, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:23:35,451 INFO L87 Difference]: Start difference. First operand 6557 states and 17509 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 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 21:23:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:40,036 INFO L93 Difference]: Finished difference Result 10588 states and 25212 transitions. [2022-03-15 21:23:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-03-15 21:23:40,036 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 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 31 [2022-03-15 21:23:40,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:40,050 INFO L225 Difference]: With dead ends: 10588 [2022-03-15 21:23:40,050 INFO L226 Difference]: Without dead ends: 10475 [2022-03-15 21:23:40,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26759 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10852, Invalid=55454, Unknown=0, NotChecked=0, Total=66306 [2022-03-15 21:23:40,053 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 387 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:40,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:23:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10475 states. [2022-03-15 21:23:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10475 to 6771. [2022-03-15 21:23:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6771 states, 6770 states have (on average 2.6779911373707534) internal successors, (18130), 6770 states have internal predecessors, (18130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 18130 transitions. [2022-03-15 21:23:40,152 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 18130 transitions. Word has length 31 [2022-03-15 21:23:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:40,152 INFO L470 AbstractCegarLoop]: Abstraction has 6771 states and 18130 transitions. [2022-03-15 21:23:40,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 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 21:23:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 18130 transitions. [2022-03-15 21:23:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:40,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:40,159 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:40,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:40,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-03-15 21:23:40,371 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash 438758499, now seen corresponding path program 363 times [2022-03-15 21:23:40,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:40,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456738458] [2022-03-15 21:23:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:40,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:40,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:40,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456738458] [2022-03-15 21:23:40,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456738458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:40,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196355853] [2022-03-15 21:23:40,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:23:40,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:40,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:40,433 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:40,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-03-15 21:23:40,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:23:40,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:40,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:40,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:40,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196355853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:40,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:40,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:23:40,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1556279947] [2022-03-15 21:23:40,693 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:40,695 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:40,701 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:23:40,701 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:40,719 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4401554#(< i2 (* 2 N)), 4401555#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:23:40,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:23:40,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:40,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:23:40,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:23:40,720 INFO L87 Difference]: Start difference. First operand 6771 states and 18130 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:40,833 INFO L93 Difference]: Finished difference Result 8454 states and 21298 transitions. [2022-03-15 21:23:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:23:40,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:23:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:40,845 INFO L225 Difference]: With dead ends: 8454 [2022-03-15 21:23:40,845 INFO L226 Difference]: Without dead ends: 8452 [2022-03-15 21:23:40,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=536, Invalid=796, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:23:40,845 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 124 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:40,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:23:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-03-15 21:23:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 6827. [2022-03-15 21:23:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6827 states, 6826 states have (on average 2.685467330794023) internal successors, (18331), 6826 states have internal predecessors, (18331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6827 states to 6827 states and 18331 transitions. [2022-03-15 21:23:40,937 INFO L78 Accepts]: Start accepts. Automaton has 6827 states and 18331 transitions. Word has length 31 [2022-03-15 21:23:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:40,937 INFO L470 AbstractCegarLoop]: Abstraction has 6827 states and 18331 transitions. [2022-03-15 21:23:40,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6827 states and 18331 transitions. [2022-03-15 21:23:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:40,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:40,943 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:40,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-03-15 21:23:41,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:41,160 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:41,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1177212124, now seen corresponding path program 364 times [2022-03-15 21:23:41,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:41,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705923045] [2022-03-15 21:23:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:41,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:41,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:41,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705923045] [2022-03-15 21:23:41,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705923045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:41,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115792034] [2022-03-15 21:23:41,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:23:41,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:41,288 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:41,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-03-15 21:23:41,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:23:41,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:41,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:23:41,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 57 proven. 85 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:23:41,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 57 proven. 86 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:23:41,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115792034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:41,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:41,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 22] total 34 [2022-03-15 21:23:41,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [540320500] [2022-03-15 21:23:41,504 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:41,506 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:41,514 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 75 transitions. [2022-03-15 21:23:41,515 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:41,821 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [4423904#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4423890#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 4423892#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 4423902#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 4423894#(< i2 (* 2 N)), 4423899#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4423893#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 4423889#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 4423891#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 4423898#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4423903#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 4423887#(< i1 (* 2 N)), 4423888#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 4423901#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4423900#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4423896#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4423897#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4423905#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 4423895#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4423906#(<= (* 2 N) (+ 7 i2))] [2022-03-15 21:23:41,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 21:23:41,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:41,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 21:23:41,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=2318, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:23:41,821 INFO L87 Difference]: Start difference. First operand 6827 states and 18331 transitions. Second operand has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:45,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:45,714 INFO L93 Difference]: Finished difference Result 9441 states and 23763 transitions. [2022-03-15 21:23:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-03-15 21:23:45,714 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:23:45,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:45,727 INFO L225 Difference]: With dead ends: 9441 [2022-03-15 21:23:45,727 INFO L226 Difference]: Without dead ends: 9251 [2022-03-15 21:23:45,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18998 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7981, Invalid=42869, Unknown=0, NotChecked=0, Total=50850 [2022-03-15 21:23:45,730 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 530 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 1051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:45,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1051 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:23:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9251 states. [2022-03-15 21:23:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9251 to 6824. [2022-03-15 21:23:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6824 states, 6823 states have (on average 2.681371830573062) internal successors, (18295), 6823 states have internal predecessors, (18295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6824 states to 6824 states and 18295 transitions. [2022-03-15 21:23:45,831 INFO L78 Accepts]: Start accepts. Automaton has 6824 states and 18295 transitions. Word has length 31 [2022-03-15 21:23:45,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:45,831 INFO L470 AbstractCegarLoop]: Abstraction has 6824 states and 18295 transitions. [2022-03-15 21:23:45,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6824 states and 18295 transitions. [2022-03-15 21:23:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:45,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:45,838 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:45,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:46,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-03-15 21:23:46,054 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash -679990969, now seen corresponding path program 365 times [2022-03-15 21:23:46,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:46,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609350459] [2022-03-15 21:23:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 39 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:46,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:46,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609350459] [2022-03-15 21:23:46,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609350459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:46,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984871493] [2022-03-15 21:23:46,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:23:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:46,107 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:46,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-03-15 21:23:46,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:23:46,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:46,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 39 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:23:46,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 39 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:23:46,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984871493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:46,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:46,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:23:46,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [383294882] [2022-03-15 21:23:46,354 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:46,356 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:46,364 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 71 transitions. [2022-03-15 21:23:46,364 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:46,548 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [4447551#(< i2 (* 2 N)), 4447556#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4447555#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4447557#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4447559#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 4447558#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4447560#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 4447552#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4447553#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4447554#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:23:46,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:23:46,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:23:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1294, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:23:46,549 INFO L87 Difference]: Start difference. First operand 6824 states and 18295 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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 21:23:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:55,212 INFO L93 Difference]: Finished difference Result 12253 states and 28811 transitions. [2022-03-15 21:23:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2022-03-15 21:23:55,212 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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 31 [2022-03-15 21:23:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:55,228 INFO L225 Difference]: With dead ends: 12253 [2022-03-15 21:23:55,229 INFO L226 Difference]: Without dead ends: 12116 [2022-03-15 21:23:55,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58413 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=18100, Invalid=117692, Unknown=0, NotChecked=0, Total=135792 [2022-03-15 21:23:55,238 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 564 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:55,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:23:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12116 states. [2022-03-15 21:23:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12116 to 7041. [2022-03-15 21:23:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 7040 states have (on average 2.6853693181818183) internal successors, (18905), 7040 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 18905 transitions. [2022-03-15 21:23:55,355 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 18905 transitions. Word has length 31 [2022-03-15 21:23:55,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:55,355 INFO L470 AbstractCegarLoop]: Abstraction has 7041 states and 18905 transitions. [2022-03-15 21:23:55,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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 21:23:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 18905 transitions. [2022-03-15 21:23:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:55,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:55,392 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:55,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-03-15 21:23:55,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-03-15 21:23:55,603 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:55,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:55,604 INFO L85 PathProgramCache]: Analyzing trace with hash -102795485, now seen corresponding path program 366 times [2022-03-15 21:23:55,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:55,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078515608] [2022-03-15 21:23:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 47 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:55,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:55,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078515608] [2022-03-15 21:23:55,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078515608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:55,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218399284] [2022-03-15 21:23:55,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:23:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:55,657 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:55,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-03-15 21:23:55,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:23:55,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:23:55,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:23:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 47 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:55,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 47 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:55,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218399284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:55,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:55,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:23:55,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [762237658] [2022-03-15 21:23:55,901 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:55,903 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:55,909 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:23:55,909 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:55,928 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4474760#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4474759#(< i2 (* 2 N))] [2022-03-15 21:23:55,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:23:55,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:55,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:23:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:23:55,929 INFO L87 Difference]: Start difference. First operand 7041 states and 18905 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:23:56,036 INFO L93 Difference]: Finished difference Result 8262 states and 21018 transitions. [2022-03-15 21:23:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:23:56,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:23:56,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:23:56,048 INFO L225 Difference]: With dead ends: 8262 [2022-03-15 21:23:56,048 INFO L226 Difference]: Without dead ends: 8260 [2022-03-15 21:23:56,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:23:56,048 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 96 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:23:56,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:23:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2022-03-15 21:23:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 7077. [2022-03-15 21:23:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 2.690927077444884) internal successors, (19041), 7076 states have internal predecessors, (19041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:23:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 19041 transitions. [2022-03-15 21:23:56,145 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 19041 transitions. Word has length 31 [2022-03-15 21:23:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:23:56,145 INFO L470 AbstractCegarLoop]: Abstraction has 7077 states and 19041 transitions. [2022-03-15 21:23:56,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:23:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 19041 transitions. [2022-03-15 21:23:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:23:56,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:23:56,152 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:23:56,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Forceful destruction successful, exit code 0 [2022-03-15 21:23:56,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2022-03-15 21:23:56,359 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:23:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:23:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2119397974, now seen corresponding path program 367 times [2022-03-15 21:23:56,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:23:56,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379505197] [2022-03-15 21:23:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:23:56,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:23:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:23:56,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:23:56,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379505197] [2022-03-15 21:23:56,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379505197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:23:56,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911820395] [2022-03-15 21:23:56,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:23:56,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:23:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:23:56,499 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:23:56,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-03-15 21:23:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:23:56,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:23:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:23:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 62 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:23:56,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:23:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 62 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:23:56,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911820395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:23:56,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:23:56,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 22] total 34 [2022-03-15 21:23:56,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [482074846] [2022-03-15 21:23:56,791 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:23:56,793 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:23:56,802 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 79 transitions. [2022-03-15 21:23:56,802 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:23:57,334 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 22 new interpolants: [4497401#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4497402#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4497417#(<= (* 2 N) (+ i2 8)), 4497403#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4497399#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4497410#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 4497397#(< i2 (* 2 N)), 4497405#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 4497409#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 4497415#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 4497400#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4497406#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 4497408#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 4497413#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 4497407#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 4497412#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 4497404#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4497398#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4497396#(< i1 (* 2 N)), 4497414#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4497416#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 4497411#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N)))] [2022-03-15 21:23:57,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 21:23:57,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:23:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 21:23:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=2524, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:23:57,335 INFO L87 Difference]: Start difference. First operand 7077 states and 19041 transitions. Second operand has 44 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:03,172 INFO L93 Difference]: Finished difference Result 10965 states and 27450 transitions. [2022-03-15 21:24:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-03-15 21:24:03,173 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:03,188 INFO L225 Difference]: With dead ends: 10965 [2022-03-15 21:24:03,188 INFO L226 Difference]: Without dead ends: 10727 [2022-03-15 21:24:03,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26911 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=10549, Invalid=59941, Unknown=0, NotChecked=0, Total=70490 [2022-03-15 21:24:03,192 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 551 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:03,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 1 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1292 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:24:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10727 states. [2022-03-15 21:24:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10727 to 7009. [2022-03-15 21:24:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 7008 states have (on average 2.6813641552511416) internal successors, (18791), 7008 states have internal predecessors, (18791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 18791 transitions. [2022-03-15 21:24:03,298 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 18791 transitions. Word has length 31 [2022-03-15 21:24:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:03,298 INFO L470 AbstractCegarLoop]: Abstraction has 7009 states and 18791 transitions. [2022-03-15 21:24:03,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 18791 transitions. [2022-03-15 21:24:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:03,304 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:03,304 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:03,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:03,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:03,520 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:03,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash 796541033, now seen corresponding path program 368 times [2022-03-15 21:24:03,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:03,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972303709] [2022-03-15 21:24:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:03,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:03,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972303709] [2022-03-15 21:24:03,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972303709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:03,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105501918] [2022-03-15 21:24:03,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:24:03,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:03,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:03,575 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:03,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-03-15 21:24:03,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:24:03,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:03,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:03,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105501918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:03,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:03,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:24:03,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [335669221] [2022-03-15 21:24:03,826 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:03,828 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:03,836 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 75 transitions. [2022-03-15 21:24:03,837 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:04,040 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [4523034#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4523041#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 4523038#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4523042#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 4523036#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4523039#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4523035#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4523040#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 4523033#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4523037#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4523032#(< i2 (* 2 N))] [2022-03-15 21:24:04,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:24:04,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:24:04,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:24:04,041 INFO L87 Difference]: Start difference. First operand 7009 states and 18791 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:13,758 INFO L93 Difference]: Finished difference Result 13213 states and 30627 transitions. [2022-03-15 21:24:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 388 states. [2022-03-15 21:24:13,758 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:13,778 INFO L225 Difference]: With dead ends: 13213 [2022-03-15 21:24:13,778 INFO L226 Difference]: Without dead ends: 13050 [2022-03-15 21:24:13,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 415 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75531 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=21354, Invalid=152118, Unknown=0, NotChecked=0, Total=173472 [2022-03-15 21:24:13,786 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 662 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:13,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 1 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:24:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13050 states. [2022-03-15 21:24:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13050 to 7202. [2022-03-15 21:24:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7202 states, 7201 states have (on average 2.6869879183446743) internal successors, (19349), 7201 states have internal predecessors, (19349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7202 states to 7202 states and 19349 transitions. [2022-03-15 21:24:13,913 INFO L78 Accepts]: Start accepts. Automaton has 7202 states and 19349 transitions. Word has length 31 [2022-03-15 21:24:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:13,913 INFO L470 AbstractCegarLoop]: Abstraction has 7202 states and 19349 transitions. [2022-03-15 21:24:13,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 7202 states and 19349 transitions. [2022-03-15 21:24:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:13,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:13,920 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:13,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-03-15 21:24:14,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:14,123 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash -197667229, now seen corresponding path program 369 times [2022-03-15 21:24:14,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:14,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024511111] [2022-03-15 21:24:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:14,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:14,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024511111] [2022-03-15 21:24:14,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024511111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:14,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969563971] [2022-03-15 21:24:14,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:24:14,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:14,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:14,277 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:14,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-03-15 21:24:14,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:24:14,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:14,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:24:14,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-15 21:24:14,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-15 21:24:14,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969563971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:14,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:14,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 4] total 36 [2022-03-15 21:24:14,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [583793523] [2022-03-15 21:24:14,686 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:14,687 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:14,694 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 53 transitions. [2022-03-15 21:24:14,694 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:14,912 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [4551632#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N))), 4551631#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 4551624#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4551625#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4551626#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4551629#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 4551630#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 4551623#(< i2 (* 2 N)), 4551627#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4551628#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N)))] [2022-03-15 21:24:14,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:24:14,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:24:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:24:14,913 INFO L87 Difference]: Start difference. First operand 7202 states and 19349 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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 21:24:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:15,318 INFO L93 Difference]: Finished difference Result 7698 states and 20164 transitions. [2022-03-15 21:24:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:24:15,318 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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 31 [2022-03-15 21:24:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:15,329 INFO L225 Difference]: With dead ends: 7698 [2022-03-15 21:24:15,330 INFO L226 Difference]: Without dead ends: 7678 [2022-03-15 21:24:15,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=839, Invalid=3451, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:24:15,330 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 53 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:15,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2022-03-15 21:24:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7055. [2022-03-15 21:24:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7055 states, 7054 states have (on average 2.676070314715055) internal successors, (18877), 7054 states have internal predecessors, (18877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7055 states to 7055 states and 18877 transitions. [2022-03-15 21:24:15,422 INFO L78 Accepts]: Start accepts. Automaton has 7055 states and 18877 transitions. Word has length 31 [2022-03-15 21:24:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:15,422 INFO L470 AbstractCegarLoop]: Abstraction has 7055 states and 18877 transitions. [2022-03-15 21:24:15,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 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 21:24:15,422 INFO L276 IsEmpty]: Start isEmpty. Operand 7055 states and 18877 transitions. [2022-03-15 21:24:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:15,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:15,429 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:15,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:15,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:15,643 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:15,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:15,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1384039545, now seen corresponding path program 370 times [2022-03-15 21:24:15,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:15,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927554769] [2022-03-15 21:24:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:15,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:15,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927554769] [2022-03-15 21:24:15,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927554769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:15,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19072208] [2022-03-15 21:24:15,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:24:15,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:15,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:15,770 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:15,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-03-15 21:24:15,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:24:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:15,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:15,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:16,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19072208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:16,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:16,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 24] total 35 [2022-03-15 21:24:16,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1966188035] [2022-03-15 21:24:16,007 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:16,009 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:16,016 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 51 transitions. [2022-03-15 21:24:16,016 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:16,154 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [4573700#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4573696#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4573697#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4573703#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 4573701#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 4573699#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4573695#(< i2 (* 2 N)), 4573698#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4573702#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N)))] [2022-03-15 21:24:16,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:24:16,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:24:16,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1480, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:24:16,155 INFO L87 Difference]: Start difference. First operand 7055 states and 18877 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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 21:24:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:16,354 INFO L93 Difference]: Finished difference Result 7668 states and 19902 transitions. [2022-03-15 21:24:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:24:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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 31 [2022-03-15 21:24:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:16,365 INFO L225 Difference]: With dead ends: 7668 [2022-03-15 21:24:16,365 INFO L226 Difference]: Without dead ends: 7652 [2022-03-15 21:24:16,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1127, Invalid=2655, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:24:16,366 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 50 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:16,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7652 states. [2022-03-15 21:24:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7652 to 6915. [2022-03-15 21:24:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6915 states, 6914 states have (on average 2.665895284929129) internal successors, (18432), 6914 states have internal predecessors, (18432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 18432 transitions. [2022-03-15 21:24:16,450 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 18432 transitions. Word has length 31 [2022-03-15 21:24:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:16,450 INFO L470 AbstractCegarLoop]: Abstraction has 6915 states and 18432 transitions. [2022-03-15 21:24:16,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 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 21:24:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 18432 transitions. [2022-03-15 21:24:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:16,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:16,457 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:16,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-03-15 21:24:16,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:16,663 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:16,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1487184355, now seen corresponding path program 371 times [2022-03-15 21:24:16,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:16,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459545489] [2022-03-15 21:24:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:16,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:16,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:16,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459545489] [2022-03-15 21:24:16,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459545489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:16,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041361151] [2022-03-15 21:24:16,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:24:16,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:16,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:16,798 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:16,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-03-15 21:24:16,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:24:16,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:16,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:16,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:16,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:17,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041361151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:17,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:17,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 33 [2022-03-15 21:24:17,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1641136242] [2022-03-15 21:24:17,128 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:17,130 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:17,137 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 49 transitions. [2022-03-15 21:24:17,137 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:17,353 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [4595450#(< i2 (* 2 N)), 4595451#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4595455#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4595457#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 4595456#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 4595452#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4595453#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4595454#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:24:17,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:24:17,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:24:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1276, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:24:17,354 INFO L87 Difference]: Start difference. First operand 6915 states and 18432 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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 21:24:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:17,600 INFO L93 Difference]: Finished difference Result 7655 states and 19710 transitions. [2022-03-15 21:24:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:24:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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 31 [2022-03-15 21:24:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:17,611 INFO L225 Difference]: With dead ends: 7655 [2022-03-15 21:24:17,611 INFO L226 Difference]: Without dead ends: 7641 [2022-03-15 21:24:17,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=970, Invalid=2222, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:24:17,612 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:17,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7641 states. [2022-03-15 21:24:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7641 to 6786. [2022-03-15 21:24:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6786 states, 6785 states have (on average 2.6557111274871037) internal successors, (18019), 6785 states have internal predecessors, (18019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6786 states to 6786 states and 18019 transitions. [2022-03-15 21:24:17,702 INFO L78 Accepts]: Start accepts. Automaton has 6786 states and 18019 transitions. Word has length 31 [2022-03-15 21:24:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 6786 states and 18019 transitions. [2022-03-15 21:24:17,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 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 21:24:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6786 states and 18019 transitions. [2022-03-15 21:24:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:17,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:17,709 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:17,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-03-15 21:24:17,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:17,925 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash -359858169, now seen corresponding path program 372 times [2022-03-15 21:24:17,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:17,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788683444] [2022-03-15 21:24:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:17,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:18,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:18,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788683444] [2022-03-15 21:24:18,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788683444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:18,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116176802] [2022-03-15 21:24:18,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:24:18,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:18,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:18,039 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:18,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-03-15 21:24:18,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:24:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:18,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:18,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:18,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116176802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:18,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:18,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 34 [2022-03-15 21:24:18,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [555924730] [2022-03-15 21:24:18,362 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:18,363 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:18,370 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 47 transitions. [2022-03-15 21:24:18,370 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:18,498 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [4616934#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4616931#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4616933#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4616930#(< i2 (* 2 N)), 4616936#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 4616935#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4616932#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:24:18,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:24:18,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:18,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:24:18,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1251, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:24:18,499 INFO L87 Difference]: Start difference. First operand 6786 states and 18019 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 21:24:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:18,674 INFO L93 Difference]: Finished difference Result 7662 states and 19580 transitions. [2022-03-15 21:24:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:24:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 31 [2022-03-15 21:24:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:18,685 INFO L225 Difference]: With dead ends: 7662 [2022-03-15 21:24:18,686 INFO L226 Difference]: Without dead ends: 7652 [2022-03-15 21:24:18,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=937, Invalid=2033, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:24:18,686 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 64 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:18,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7652 states. [2022-03-15 21:24:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7652 to 6668. [2022-03-15 21:24:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6668 states, 6667 states have (on average 2.646317684115794) internal successors, (17643), 6667 states have internal predecessors, (17643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6668 states to 6668 states and 17643 transitions. [2022-03-15 21:24:18,774 INFO L78 Accepts]: Start accepts. Automaton has 6668 states and 17643 transitions. Word has length 31 [2022-03-15 21:24:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:18,774 INFO L470 AbstractCegarLoop]: Abstraction has 6668 states and 17643 transitions. [2022-03-15 21:24:18,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 21:24:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6668 states and 17643 transitions. [2022-03-15 21:24:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:18,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:18,781 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:18,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:18,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:18,991 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:18,991 INFO L85 PathProgramCache]: Analyzing trace with hash 550391139, now seen corresponding path program 373 times [2022-03-15 21:24:18,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:18,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479509614] [2022-03-15 21:24:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:19,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:19,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479509614] [2022-03-15 21:24:19,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479509614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:19,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746649096] [2022-03-15 21:24:19,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:24:19,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:19,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:19,105 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:19,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-03-15 21:24:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:19,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:19,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746649096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:19,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:19,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 32 [2022-03-15 21:24:19,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1226182865] [2022-03-15 21:24:19,439 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:19,441 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:19,447 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 45 transitions. [2022-03-15 21:24:19,447 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:19,600 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [4638176#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4638177#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4638178#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4638179#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4638174#(< i2 (* 2 N)), 4638175#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:24:19,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:24:19,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:24:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1060, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:24:19,601 INFO L87 Difference]: Start difference. First operand 6668 states and 17643 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:19,814 INFO L93 Difference]: Finished difference Result 7687 states and 19501 transitions. [2022-03-15 21:24:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:24:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:19,825 INFO L225 Difference]: With dead ends: 7687 [2022-03-15 21:24:19,825 INFO L226 Difference]: Without dead ends: 7679 [2022-03-15 21:24:19,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=795, Invalid=1655, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:24:19,826 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 75 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:19,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2022-03-15 21:24:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 6561. [2022-03-15 21:24:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6561 states, 6560 states have (on average 2.6370426829268294) internal successors, (17299), 6560 states have internal predecessors, (17299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6561 states to 6561 states and 17299 transitions. [2022-03-15 21:24:19,909 INFO L78 Accepts]: Start accepts. Automaton has 6561 states and 17299 transitions. Word has length 31 [2022-03-15 21:24:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:19,909 INFO L470 AbstractCegarLoop]: Abstraction has 6561 states and 17299 transitions. [2022-03-15 21:24:19,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6561 states and 17299 transitions. [2022-03-15 21:24:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:19,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:19,915 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:19,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:20,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-03-15 21:24:20,131 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash -390077305, now seen corresponding path program 374 times [2022-03-15 21:24:20,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:20,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565071308] [2022-03-15 21:24:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 59 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:20,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:20,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565071308] [2022-03-15 21:24:20,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565071308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:20,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431500396] [2022-03-15 21:24:20,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:24:20,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:20,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:20,235 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:20,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-03-15 21:24:20,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:24:20,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 59 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:20,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 59 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:20,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431500396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:20,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:20,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 22] total 33 [2022-03-15 21:24:20,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [379458872] [2022-03-15 21:24:20,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:20,593 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:20,599 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 43 transitions. [2022-03-15 21:24:20,599 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:20,673 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [4659227#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4659229#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4659225#(< i2 (* 2 N)), 4659228#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4659226#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:24:20,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:24:20,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:24:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1027, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:24:20,674 INFO L87 Difference]: Start difference. First operand 6561 states and 17299 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:20,837 INFO L93 Difference]: Finished difference Result 7707 states and 19426 transitions. [2022-03-15 21:24:20,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:24:20,837 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:20,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:20,848 INFO L225 Difference]: With dead ends: 7707 [2022-03-15 21:24:20,848 INFO L226 Difference]: Without dead ends: 7703 [2022-03-15 21:24:20,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:24:20,848 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 73 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:20,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:20,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7703 states. [2022-03-15 21:24:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7703 to 6466. [2022-03-15 21:24:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6466 states, 6465 states have (on average 2.62846094354215) internal successors, (16993), 6465 states have internal predecessors, (16993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6466 states to 6466 states and 16993 transitions. [2022-03-15 21:24:20,932 INFO L78 Accepts]: Start accepts. Automaton has 6466 states and 16993 transitions. Word has length 31 [2022-03-15 21:24:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:20,932 INFO L470 AbstractCegarLoop]: Abstraction has 6466 states and 16993 transitions. [2022-03-15 21:24:20,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6466 states and 16993 transitions. [2022-03-15 21:24:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:20,938 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:20,938 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:20,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:21,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-03-15 21:24:21,139 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:21,139 INFO L85 PathProgramCache]: Analyzing trace with hash -697509661, now seen corresponding path program 375 times [2022-03-15 21:24:21,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:21,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216421709] [2022-03-15 21:24:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:21,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 58 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:21,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:21,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216421709] [2022-03-15 21:24:21,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216421709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:21,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664853479] [2022-03-15 21:24:21,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:24:21,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:21,247 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:21,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-03-15 21:24:21,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:24:21,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:21,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:24:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-15 21:24:21,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-15 21:24:21,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664853479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:21,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:21,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 4] total 30 [2022-03-15 21:24:21,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1147624648] [2022-03-15 21:24:21,601 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:21,603 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:21,609 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2022-03-15 21:24:21,609 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:21,704 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [4680101#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4680099#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4680098#(< i2 (* 2 N)), 4680100#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:24:21,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:24:21,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:21,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:24:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:24:21,705 INFO L87 Difference]: Start difference. First operand 6466 states and 16993 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:21,902 INFO L93 Difference]: Finished difference Result 7709 states and 19324 transitions. [2022-03-15 21:24:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:24:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:21,913 INFO L225 Difference]: With dead ends: 7709 [2022-03-15 21:24:21,913 INFO L226 Difference]: Without dead ends: 7706 [2022-03-15 21:24:21,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:24:21,914 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:21,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2022-03-15 21:24:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 6382. [2022-03-15 21:24:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6382 states, 6381 states have (on average 2.620122237893747) internal successors, (16719), 6381 states have internal predecessors, (16719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 16719 transitions. [2022-03-15 21:24:22,011 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 16719 transitions. Word has length 31 [2022-03-15 21:24:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:22,011 INFO L470 AbstractCegarLoop]: Abstraction has 6382 states and 16719 transitions. [2022-03-15 21:24:22,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 16719 transitions. [2022-03-15 21:24:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:22,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:22,018 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:22,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:22,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-03-15 21:24:22,231 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash 123857159, now seen corresponding path program 376 times [2022-03-15 21:24:22,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:22,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543599423] [2022-03-15 21:24:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:22,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 57 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:22,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:22,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543599423] [2022-03-15 21:24:22,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543599423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:22,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195354700] [2022-03-15 21:24:22,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:24:22,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:22,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:22,320 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:22,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-03-15 21:24:22,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:24:22,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 57 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:22,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 57 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:22,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195354700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:22,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:22,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 32 [2022-03-15 21:24:22,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1949069449] [2022-03-15 21:24:22,673 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:22,675 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:22,681 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 39 transitions. [2022-03-15 21:24:22,681 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:22,730 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [4700804#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4700802#(< i2 (* 2 N)), 4700803#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:24:22,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:24:22,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:24:22,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=808, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:24:22,730 INFO L87 Difference]: Start difference. First operand 6382 states and 16719 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 21:24:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:22,912 INFO L93 Difference]: Finished difference Result 7654 states and 19106 transitions. [2022-03-15 21:24:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:24:22,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 31 [2022-03-15 21:24:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:22,923 INFO L225 Difference]: With dead ends: 7654 [2022-03-15 21:24:22,924 INFO L226 Difference]: Without dead ends: 7654 [2022-03-15 21:24:22,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=620, Invalid=1020, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:24:22,924 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:22,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7654 states. [2022-03-15 21:24:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7654 to 6388. [2022-03-15 21:24:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6388 states, 6387 states have (on average 2.620479098168154) internal successors, (16737), 6387 states have internal predecessors, (16737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 16737 transitions. [2022-03-15 21:24:23,008 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 16737 transitions. Word has length 31 [2022-03-15 21:24:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:23,008 INFO L470 AbstractCegarLoop]: Abstraction has 6388 states and 16737 transitions. [2022-03-15 21:24:23,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 21:24:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 16737 transitions. [2022-03-15 21:24:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:23,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:23,014 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:23,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:23,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-03-15 21:24:23,222 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash 288900195, now seen corresponding path program 377 times [2022-03-15 21:24:23,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:23,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25580808] [2022-03-15 21:24:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 56 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:23,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:23,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25580808] [2022-03-15 21:24:23,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25580808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:23,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148084770] [2022-03-15 21:24:23,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:24:23,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:23,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:23,296 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:23,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-03-15 21:24:23,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:24:23,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 56 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:23,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 56 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:23,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148084770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:23,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:23,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 19] total 30 [2022-03-15 21:24:23,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1561373475] [2022-03-15 21:24:23,602 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:23,604 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:23,610 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2022-03-15 21:24:23,610 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:23,634 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4721457#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4721456#(< i2 (* 2 N))] [2022-03-15 21:24:23,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:24:23,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:24:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=643, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:24:23,634 INFO L87 Difference]: Start difference. First operand 6388 states and 16737 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:24:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:23,778 INFO L93 Difference]: Finished difference Result 8207 states and 20180 transitions. [2022-03-15 21:24:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:24:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 31 [2022-03-15 21:24:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:23,790 INFO L225 Difference]: With dead ends: 8207 [2022-03-15 21:24:23,790 INFO L226 Difference]: Without dead ends: 8207 [2022-03-15 21:24:23,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=508, Invalid=752, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:24:23,790 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 108 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:23,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8207 states. [2022-03-15 21:24:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8207 to 6443. [2022-03-15 21:24:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6443 states, 6442 states have (on average 2.6299285936044705) internal successors, (16942), 6442 states have internal predecessors, (16942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6443 states to 6443 states and 16942 transitions. [2022-03-15 21:24:23,913 INFO L78 Accepts]: Start accepts. Automaton has 6443 states and 16942 transitions. Word has length 31 [2022-03-15 21:24:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:23,913 INFO L470 AbstractCegarLoop]: Abstraction has 6443 states and 16942 transitions. [2022-03-15 21:24:23,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 21:24:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6443 states and 16942 transitions. [2022-03-15 21:24:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:23,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:23,919 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:23,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:24,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:24,120 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1262388252, now seen corresponding path program 378 times [2022-03-15 21:24:24,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:24,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150005686] [2022-03-15 21:24:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 69 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:24:24,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:24,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150005686] [2022-03-15 21:24:24,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150005686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:24,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425473719] [2022-03-15 21:24:24,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:24:24,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:24,254 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:24,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-03-15 21:24:24,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:24:24,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:24,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 68 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:24,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 68 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:24,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425473719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:24,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:24,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 25] total 38 [2022-03-15 21:24:24,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [923304584] [2022-03-15 21:24:24,598 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:24,600 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:24,609 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 83 transitions. [2022-03-15 21:24:24,609 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:24,995 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 24 new interpolants: [4742794#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 4742782#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 4742713#(<= (* 2 N) (+ 9 i2)), 4742779#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 4742776#(< i2 (* 2 N)), 4742791#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4742788#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4742780#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 4742793#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 4742790#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 4742795#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 4742785#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4742798#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 7 i2))), 4742781#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 4742792#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4742786#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 4742778#(< i1 (* 2 N)), 4742777#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4742783#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4742784#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4742789#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 4742797#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11))), 4742787#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 4742796#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N)))] [2022-03-15 21:24:24,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 21:24:24,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 21:24:24,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3033, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:24:24,996 INFO L87 Difference]: Start difference. First operand 6443 states and 16942 transitions. Second operand has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:32,309 INFO L93 Difference]: Finished difference Result 10312 states and 25303 transitions. [2022-03-15 21:24:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-03-15 21:24:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:32,322 INFO L225 Difference]: With dead ends: 10312 [2022-03-15 21:24:32,322 INFO L226 Difference]: Without dead ends: 10014 [2022-03-15 21:24:32,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28037 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11624, Invalid=64828, Unknown=0, NotChecked=0, Total=76452 [2022-03-15 21:24:32,325 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 658 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 1311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1311 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:32,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 1 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1311 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:24:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10014 states. [2022-03-15 21:24:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10014 to 6377. [2022-03-15 21:24:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6377 states, 6376 states have (on average 2.617001254705144) internal successors, (16686), 6376 states have internal predecessors, (16686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6377 states to 6377 states and 16686 transitions. [2022-03-15 21:24:32,418 INFO L78 Accepts]: Start accepts. Automaton has 6377 states and 16686 transitions. Word has length 31 [2022-03-15 21:24:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:32,418 INFO L470 AbstractCegarLoop]: Abstraction has 6377 states and 16686 transitions. [2022-03-15 21:24:32,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6377 states and 16686 transitions. [2022-03-15 21:24:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:32,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:32,424 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:32,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:32,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2022-03-15 21:24:32,640 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash -675607161, now seen corresponding path program 379 times [2022-03-15 21:24:32,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:32,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892347090] [2022-03-15 21:24:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 55 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:32,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:32,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892347090] [2022-03-15 21:24:32,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892347090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:32,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312474743] [2022-03-15 21:24:32,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:24:32,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:32,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:32,740 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:32,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-03-15 21:24:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:32,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:32,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 55 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:32,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:33,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312474743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:33,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:33,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:24:33,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [87261972] [2022-03-15 21:24:33,079 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:33,080 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:33,089 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 79 transitions. [2022-03-15 21:24:33,090 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:33,427 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [4766508#(< i2 (* 2 N)), 4766510#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 4766516#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 4766511#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 4766517#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 4766519#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 4766518#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 4766512#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 4766515#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 4766514#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 4766509#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 4766513#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:24:33,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:24:33,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:33,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:24:33,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=1464, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:24:33,428 INFO L87 Difference]: Start difference. First operand 6377 states and 16686 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:45,982 INFO L93 Difference]: Finished difference Result 15716 states and 34564 transitions. [2022-03-15 21:24:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2022-03-15 21:24:45,982 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:46,002 INFO L225 Difference]: With dead ends: 15716 [2022-03-15 21:24:46,003 INFO L226 Difference]: Without dead ends: 15716 [2022-03-15 21:24:46,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142044 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=35579, Invalid=277461, Unknown=0, NotChecked=0, Total=313040 [2022-03-15 21:24:46,019 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 873 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:46,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 1 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:24:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15716 states. [2022-03-15 21:24:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15716 to 6615. [2022-03-15 21:24:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6615 states, 6614 states have (on average 2.62276988206834) internal successors, (17347), 6614 states have internal predecessors, (17347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6615 states to 6615 states and 17347 transitions. [2022-03-15 21:24:46,182 INFO L78 Accepts]: Start accepts. Automaton has 6615 states and 17347 transitions. Word has length 31 [2022-03-15 21:24:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:46,182 INFO L470 AbstractCegarLoop]: Abstraction has 6615 states and 17347 transitions. [2022-03-15 21:24:46,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6615 states and 17347 transitions. [2022-03-15 21:24:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:46,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:46,190 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:46,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:46,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2022-03-15 21:24:46,406 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:46,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:46,407 INFO L85 PathProgramCache]: Analyzing trace with hash -858480535, now seen corresponding path program 380 times [2022-03-15 21:24:46,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:46,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221710899] [2022-03-15 21:24:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:46,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:46,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:46,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221710899] [2022-03-15 21:24:46,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221710899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:46,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789974085] [2022-03-15 21:24:46,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:24:46,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:46,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:46,517 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:46,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-03-15 21:24:46,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:24:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:46,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:46,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789974085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:46,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:46,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 25] total 37 [2022-03-15 21:24:46,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1035608067] [2022-03-15 21:24:46,742 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:46,744 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:46,751 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:46,751 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:46,933 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [4796716#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4796718#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4796720#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 4796714#(< i2 (* 2 N)), 4796717#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4796722#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 4796715#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4796724#(or (< i2 (* 2 N)) (<= (+ i1 10) (* 2 N))), 4796719#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4796723#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N))), 4796721#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N)))] [2022-03-15 21:24:46,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:24:46,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:46,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:24:46,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:24:46,934 INFO L87 Difference]: Start difference. First operand 6615 states and 17347 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 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 21:24:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:47,184 INFO L93 Difference]: Finished difference Result 7131 states and 18097 transitions. [2022-03-15 21:24:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:24:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 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 31 [2022-03-15 21:24:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:47,194 INFO L225 Difference]: With dead ends: 7131 [2022-03-15 21:24:47,194 INFO L226 Difference]: Without dead ends: 7131 [2022-03-15 21:24:47,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1387, Invalid=3443, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:24:47,195 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 104 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:47,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7131 states. [2022-03-15 21:24:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7131 to 6616. [2022-03-15 21:24:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6616 states, 6615 states have (on average 2.6126984126984127) internal successors, (17283), 6615 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 17283 transitions. [2022-03-15 21:24:47,275 INFO L78 Accepts]: Start accepts. Automaton has 6616 states and 17283 transitions. Word has length 31 [2022-03-15 21:24:47,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:47,275 INFO L470 AbstractCegarLoop]: Abstraction has 6616 states and 17283 transitions. [2022-03-15 21:24:47,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 35 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 21:24:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 6616 states and 17283 transitions. [2022-03-15 21:24:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:47,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:47,282 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:47,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:47,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:47,498 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash 88089123, now seen corresponding path program 381 times [2022-03-15 21:24:47,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:47,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521944911] [2022-03-15 21:24:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:47,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:47,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:47,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521944911] [2022-03-15 21:24:47,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521944911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:47,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661285988] [2022-03-15 21:24:47,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:24:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:47,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:47,609 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:47,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-03-15 21:24:47,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:24:47,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:24:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-15 21:24:47,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-15 21:24:47,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661285988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:47,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:47,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 4] total 37 [2022-03-15 21:24:47,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [508183824] [2022-03-15 21:24:47,894 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:47,896 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:47,903 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:47,903 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:48,186 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [4817352#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4817356#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 4817350#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4817355#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 4817349#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4817351#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4817354#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 4817353#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4817348#(< i2 (* 2 N)), 4817357#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N)))] [2022-03-15 21:24:48,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:24:48,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:24:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1940, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:24:48,187 INFO L87 Difference]: Start difference. First operand 6616 states and 17283 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 21:24:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:48,480 INFO L93 Difference]: Finished difference Result 7311 states and 18344 transitions. [2022-03-15 21:24:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:24:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 31 [2022-03-15 21:24:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:48,491 INFO L225 Difference]: With dead ends: 7311 [2022-03-15 21:24:48,492 INFO L226 Difference]: Without dead ends: 7311 [2022-03-15 21:24:48,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=871, Invalid=3551, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:24:48,492 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 92 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:48,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7311 states. [2022-03-15 21:24:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7311 to 6612. [2022-03-15 21:24:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.6053547118438964) internal successors, (17224), 6611 states have internal predecessors, (17224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 17224 transitions. [2022-03-15 21:24:48,573 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 17224 transitions. Word has length 31 [2022-03-15 21:24:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:48,573 INFO L470 AbstractCegarLoop]: Abstraction has 6612 states and 17224 transitions. [2022-03-15 21:24:48,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 21:24:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 17224 transitions. [2022-03-15 21:24:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:48,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:48,579 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:48,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:48,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:48,795 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:48,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1088454953, now seen corresponding path program 382 times [2022-03-15 21:24:48,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:48,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697237878] [2022-03-15 21:24:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:48,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:48,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:48,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697237878] [2022-03-15 21:24:48,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697237878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:48,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546625961] [2022-03-15 21:24:48,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:24:48,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:48,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:48,901 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:48,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-03-15 21:24:48,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:24:48,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:48,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:48,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:48,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:49,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546625961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:49,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:49,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 24] total 36 [2022-03-15 21:24:49,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32908335] [2022-03-15 21:24:49,133 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:49,135 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:49,142 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:49,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:49,291 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [4838148#(< i2 (* 2 N)), 4838153#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4838151#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4838149#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4838152#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4838150#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4838156#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 4838155#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 4838154#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N)))] [2022-03-15 21:24:49,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:24:49,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:24:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1542, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:24:49,293 INFO L87 Difference]: Start difference. First operand 6612 states and 17224 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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 21:24:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:49,548 INFO L93 Difference]: Finished difference Result 7521 states and 18683 transitions. [2022-03-15 21:24:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:24:49,548 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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 31 [2022-03-15 21:24:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:49,558 INFO L225 Difference]: With dead ends: 7521 [2022-03-15 21:24:49,558 INFO L226 Difference]: Without dead ends: 7521 [2022-03-15 21:24:49,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1173, Invalid=2733, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:24:49,559 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:49,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7521 states. [2022-03-15 21:24:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7521 to 6609. [2022-03-15 21:24:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6609 states, 6608 states have (on average 2.599273607748184) internal successors, (17176), 6608 states have internal predecessors, (17176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 17176 transitions. [2022-03-15 21:24:49,641 INFO L78 Accepts]: Start accepts. Automaton has 6609 states and 17176 transitions. Word has length 31 [2022-03-15 21:24:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:49,641 INFO L470 AbstractCegarLoop]: Abstraction has 6609 states and 17176 transitions. [2022-03-15 21:24:49,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 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 21:24:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6609 states and 17176 transitions. [2022-03-15 21:24:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:49,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:49,648 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:49,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:49,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:49,855 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:49,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1674914147, now seen corresponding path program 383 times [2022-03-15 21:24:49,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:49,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373515002] [2022-03-15 21:24:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:49,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:49,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:49,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373515002] [2022-03-15 21:24:49,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373515002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:49,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877301150] [2022-03-15 21:24:49,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:24:49,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:49,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:49,945 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:49,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-03-15 21:24:49,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:24:49,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:50,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:50,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877301150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:50,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:50,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 23] total 35 [2022-03-15 21:24:50,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1988228115] [2022-03-15 21:24:50,242 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:50,244 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:50,251 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:50,251 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:50,383 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [4859147#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4859150#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4859151#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4859148#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4859153#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 4859146#(< i2 (* 2 N)), 4859149#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4859152#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N)))] [2022-03-15 21:24:50,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:24:50,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:24:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1393, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:24:50,383 INFO L87 Difference]: Start difference. First operand 6609 states and 17176 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:50,583 INFO L93 Difference]: Finished difference Result 7787 states and 19148 transitions. [2022-03-15 21:24:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:24:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:50,594 INFO L225 Difference]: With dead ends: 7787 [2022-03-15 21:24:50,594 INFO L226 Difference]: Without dead ends: 7787 [2022-03-15 21:24:50,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1053, Invalid=2369, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:24:50,594 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 93 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:50,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7787 states. [2022-03-15 21:24:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7787 to 6609. [2022-03-15 21:24:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6609 states, 6608 states have (on average 2.5939769975786926) internal successors, (17141), 6608 states have internal predecessors, (17141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 17141 transitions. [2022-03-15 21:24:50,678 INFO L78 Accepts]: Start accepts. Automaton has 6609 states and 17141 transitions. Word has length 31 [2022-03-15 21:24:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:50,678 INFO L470 AbstractCegarLoop]: Abstraction has 6609 states and 17141 transitions. [2022-03-15 21:24:50,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6609 states and 17141 transitions. [2022-03-15 21:24:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:50,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:50,684 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:50,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:50,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2022-03-15 21:24:50,899 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:50,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1139642857, now seen corresponding path program 384 times [2022-03-15 21:24:50,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:50,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873062897] [2022-03-15 21:24:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:50,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:50,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:50,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873062897] [2022-03-15 21:24:50,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873062897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:50,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559376222] [2022-03-15 21:24:50,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:24:50,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:50,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:50,980 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:50,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-03-15 21:24:51,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 21:24:51,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:51,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:51,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:51,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:51,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559376222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:51,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:51,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 23] total 35 [2022-03-15 21:24:51,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [819541963] [2022-03-15 21:24:51,235 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:51,236 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:51,244 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:51,244 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:51,381 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [4880409#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 4880407#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4880408#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4880410#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4880406#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4880405#(< i2 (* 2 N)), 4880411#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N)))] [2022-03-15 21:24:51,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:24:51,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:24:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:24:51,382 INFO L87 Difference]: Start difference. First operand 6609 states and 17141 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:51,579 INFO L93 Difference]: Finished difference Result 8099 states and 19717 transitions. [2022-03-15 21:24:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:24:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:24:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:51,589 INFO L225 Difference]: With dead ends: 8099 [2022-03-15 21:24:51,590 INFO L226 Difference]: Without dead ends: 8099 [2022-03-15 21:24:51,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:24:51,590 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:51,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2022-03-15 21:24:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 6610. [2022-03-15 21:24:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6610 states, 6609 states have (on average 2.589953094265396) internal successors, (17117), 6609 states have internal predecessors, (17117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6610 states to 6610 states and 17117 transitions. [2022-03-15 21:24:51,673 INFO L78 Accepts]: Start accepts. Automaton has 6610 states and 17117 transitions. Word has length 31 [2022-03-15 21:24:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:51,673 INFO L470 AbstractCegarLoop]: Abstraction has 6610 states and 17117 transitions. [2022-03-15 21:24:51,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 6610 states and 17117 transitions. [2022-03-15 21:24:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:51,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:51,679 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:51,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:51,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-03-15 21:24:51,895 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1232928605, now seen corresponding path program 385 times [2022-03-15 21:24:51,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:51,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035356318] [2022-03-15 21:24:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:51,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:51,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:51,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035356318] [2022-03-15 21:24:51,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035356318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:51,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690746942] [2022-03-15 21:24:51,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:24:51,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:51,970 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:51,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-03-15 21:24:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:52,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:52,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690746942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:52,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:52,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22] total 34 [2022-03-15 21:24:52,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [439306917] [2022-03-15 21:24:52,225 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:52,227 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:52,234 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:52,234 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:52,335 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [4901975#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4901977#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 4901973#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4901972#(< i2 (* 2 N)), 4901974#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4901976#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:24:52,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:24:52,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:24:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1163, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:24:52,335 INFO L87 Difference]: Start difference. First operand 6610 states and 17117 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) 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 21:24:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:52,525 INFO L93 Difference]: Finished difference Result 8463 states and 20396 transitions. [2022-03-15 21:24:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:24:52,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 31 [2022-03-15 21:24:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:52,537 INFO L225 Difference]: With dead ends: 8463 [2022-03-15 21:24:52,537 INFO L226 Difference]: Without dead ends: 8463 [2022-03-15 21:24:52,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=872, Invalid=1780, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:24:52,538 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 77 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:52,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2022-03-15 21:24:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 6614. [2022-03-15 21:24:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6614 states, 6613 states have (on average 2.5867231211250568) internal successors, (17106), 6613 states have internal predecessors, (17106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6614 states to 6614 states and 17106 transitions. [2022-03-15 21:24:52,623 INFO L78 Accepts]: Start accepts. Automaton has 6614 states and 17106 transitions. Word has length 31 [2022-03-15 21:24:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:52,623 INFO L470 AbstractCegarLoop]: Abstraction has 6614 states and 17106 transitions. [2022-03-15 21:24:52,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 21:24:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 6614 states and 17106 transitions. [2022-03-15 21:24:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:52,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:52,629 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:52,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-03-15 21:24:52,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-03-15 21:24:52,843 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:52,844 INFO L85 PathProgramCache]: Analyzing trace with hash 76010153, now seen corresponding path program 386 times [2022-03-15 21:24:52,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:52,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828335796] [2022-03-15 21:24:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:52,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:52,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:52,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828335796] [2022-03-15 21:24:52,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828335796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:52,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821554854] [2022-03-15 21:24:52,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:24:52,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:52,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:52,913 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:52,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-03-15 21:24:52,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:24:52,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:52,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:52,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:52,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:53,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821554854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:53,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:53,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22] total 34 [2022-03-15 21:24:53,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [472162825] [2022-03-15 21:24:53,214 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:53,216 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:53,223 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:53,223 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:53,338 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [4923908#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 4923909#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4923907#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4923906#(< i2 (* 2 N)), 4923910#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N)))] [2022-03-15 21:24:53,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:24:53,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:53,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:24:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1075, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:24:53,339 INFO L87 Difference]: Start difference. First operand 6614 states and 17106 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) 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 21:24:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:53,550 INFO L93 Difference]: Finished difference Result 8861 states and 21145 transitions. [2022-03-15 21:24:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:24:53,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 31 [2022-03-15 21:24:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:53,562 INFO L225 Difference]: With dead ends: 8861 [2022-03-15 21:24:53,562 INFO L226 Difference]: Without dead ends: 8861 [2022-03-15 21:24:53,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=808, Invalid=1544, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:24:53,563 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:53,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8861 states. [2022-03-15 21:24:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8861 to 6619. [2022-03-15 21:24:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6618 states have (on average 2.584768812330009) internal successors, (17106), 6618 states have internal predecessors, (17106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 17106 transitions. [2022-03-15 21:24:53,652 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 17106 transitions. Word has length 31 [2022-03-15 21:24:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:53,652 INFO L470 AbstractCegarLoop]: Abstraction has 6619 states and 17106 transitions. [2022-03-15 21:24:53,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) 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 21:24:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 17106 transitions. [2022-03-15 21:24:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:53,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:53,658 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:53,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:53,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:53,872 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -851597341, now seen corresponding path program 387 times [2022-03-15 21:24:53,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:53,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073751052] [2022-03-15 21:24:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:53,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:53,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073751052] [2022-03-15 21:24:53,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073751052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:53,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80730886] [2022-03-15 21:24:53,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:24:53,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:53,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:53,986 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:53,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-03-15 21:24:54,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:24:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:54,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:24:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-15 21:24:54,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-15 21:24:54,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80730886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:54,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:54,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 4] total 31 [2022-03-15 21:24:54,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2054425423] [2022-03-15 21:24:54,308 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:54,310 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:54,317 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:54,318 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:54,452 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [4946240#(< i2 (* 2 N)), 4946243#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 4946241#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4946242#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:24:54,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:24:54,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:54,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:24:54,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:24:54,453 INFO L87 Difference]: Start difference. First operand 6619 states and 17106 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) 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 21:24:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:54,757 INFO L93 Difference]: Finished difference Result 9292 states and 21957 transitions. [2022-03-15 21:24:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:24:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) 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 31 [2022-03-15 21:24:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:54,770 INFO L225 Difference]: With dead ends: 9292 [2022-03-15 21:24:54,770 INFO L226 Difference]: Without dead ends: 9292 [2022-03-15 21:24:54,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=1496, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:24:54,771 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 81 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:54,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:24:54,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9292 states. [2022-03-15 21:24:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9292 to 6627. [2022-03-15 21:24:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 6626 states have (on average 2.5836100211288864) internal successors, (17119), 6626 states have internal predecessors, (17119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 17119 transitions. [2022-03-15 21:24:54,869 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 17119 transitions. Word has length 31 [2022-03-15 21:24:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:54,869 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 17119 transitions. [2022-03-15 21:24:54,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) 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 21:24:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 17119 transitions. [2022-03-15 21:24:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:54,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:54,875 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:54,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Ended with exit code 0 [2022-03-15 21:24:55,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-03-15 21:24:55,079 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:55,079 INFO L85 PathProgramCache]: Analyzing trace with hash -465878167, now seen corresponding path program 388 times [2022-03-15 21:24:55,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:55,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606942025] [2022-03-15 21:24:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:55,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:55,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606942025] [2022-03-15 21:24:55,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606942025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:55,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626949673] [2022-03-15 21:24:55,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:24:55,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:55,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:55,182 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:55,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-03-15 21:24:55,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:24:55,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:55,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:55,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626949673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:55,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:55,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 21] total 33 [2022-03-15 21:24:55,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1712277435] [2022-03-15 21:24:55,528 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:55,530 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:55,538 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:55,538 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:55,630 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [4969018#(< i2 (* 2 N)), 4969019#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4969020#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N)))] [2022-03-15 21:24:55,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:24:55,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:24:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=849, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:24:55,631 INFO L87 Difference]: Start difference. First operand 6627 states and 17119 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 21:24:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:55,849 INFO L93 Difference]: Finished difference Result 9667 states and 22656 transitions. [2022-03-15 21:24:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:24:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 31 [2022-03-15 21:24:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:55,862 INFO L225 Difference]: With dead ends: 9667 [2022-03-15 21:24:55,862 INFO L226 Difference]: Without dead ends: 9667 [2022-03-15 21:24:55,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=657, Invalid=1065, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:24:55,862 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 102 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:55,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:24:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9667 states. [2022-03-15 21:24:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9667 to 6638. [2022-03-15 21:24:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 2.5832454422178697) internal successors, (17145), 6637 states have internal predecessors, (17145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 17145 transitions. [2022-03-15 21:24:55,959 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 17145 transitions. Word has length 31 [2022-03-15 21:24:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:55,959 INFO L470 AbstractCegarLoop]: Abstraction has 6638 states and 17145 transitions. [2022-03-15 21:24:55,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 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 21:24:55,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 17145 transitions. [2022-03-15 21:24:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:55,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:55,965 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:55,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:56,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:56,180 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash -453435613, now seen corresponding path program 389 times [2022-03-15 21:24:56,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:56,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126200325] [2022-03-15 21:24:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:56,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:56,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:56,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126200325] [2022-03-15 21:24:56,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126200325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:56,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157591551] [2022-03-15 21:24:56,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:24:56,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:56,269 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:56,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-03-15 21:24:56,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:24:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:56,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:56,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:56,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:56,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157591551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:56,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:56,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 20] total 32 [2022-03-15 21:24:56,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2005922041] [2022-03-15 21:24:56,586 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:56,588 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:56,596 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 57 transitions. [2022-03-15 21:24:56,596 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:56,646 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4992188#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 4992187#(< i2 (* 2 N))] [2022-03-15 21:24:56,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:24:56,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:56,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:24:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=718, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:24:56,647 INFO L87 Difference]: Start difference. First operand 6638 states and 17145 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 21:24:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:24:56,763 INFO L93 Difference]: Finished difference Result 9612 states and 22520 transitions. [2022-03-15 21:24:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:24:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 31 [2022-03-15 21:24:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:24:56,779 INFO L225 Difference]: With dead ends: 9612 [2022-03-15 21:24:56,779 INFO L226 Difference]: Without dead ends: 9612 [2022-03-15 21:24:56,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=573, Invalid=833, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:24:56,780 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 93 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:24:56,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:24:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2022-03-15 21:24:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 6646. [2022-03-15 21:24:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6646 states, 6645 states have (on average 2.583747178329571) internal successors, (17169), 6645 states have internal predecessors, (17169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:24:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6646 states to 6646 states and 17169 transitions. [2022-03-15 21:24:56,876 INFO L78 Accepts]: Start accepts. Automaton has 6646 states and 17169 transitions. Word has length 31 [2022-03-15 21:24:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:24:56,876 INFO L470 AbstractCegarLoop]: Abstraction has 6646 states and 17169 transitions. [2022-03-15 21:24:56,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 21:24:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6646 states and 17169 transitions. [2022-03-15 21:24:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:24:56,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:24:56,882 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:24:56,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-03-15 21:24:57,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2022-03-15 21:24:57,097 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:24:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:24:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash -464890646, now seen corresponding path program 390 times [2022-03-15 21:24:57,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:24:57,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107591424] [2022-03-15 21:24:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:24:57,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:24:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:24:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 79 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:24:57,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:24:57,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107591424] [2022-03-15 21:24:57,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107591424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:24:57,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530314370] [2022-03-15 21:24:57,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:24:57,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:24:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:24:57,205 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:24:57,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-03-15 21:24:57,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:24:57,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:24:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:24:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:24:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 79 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:24:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:24:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 79 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:24:57,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530314370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:24:57,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:24:57,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 25] total 38 [2022-03-15 21:24:57,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1951994811] [2022-03-15 21:24:57,448 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:24:57,450 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:24:57,461 INFO L252 McrAutomatonBuilder]: Finished intersection with 71 states and 109 transitions. [2022-03-15 21:24:57,461 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:24:57,921 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 26 new interpolants: [5015340#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 5015323#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 5015336#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 5015337#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 5015320#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 5015326#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 5015342#(or (< i1 (* 2 N)) (<= (* 2 N) (+ i2 8))), 5015329#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 5015319#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 5015325#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 5015330#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11))), 5015335#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 5015341#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 7 i2))), 5015339#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 5015318#(< i2 (* 2 N)), 5015328#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 5015322#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 5015334#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 5015338#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 5015332#(< i1 (* 2 N)), 5015321#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 5015324#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 5015259#(<= (* 2 N) (+ i2 10)), 5015331#(or (<= (* 2 N) (+ i2 12)) (< (+ i2 13) (* 2 N))), 5015333#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 5015327#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8)))] [2022-03-15 21:24:57,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 21:24:57,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:24:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 21:24:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=774, Invalid=3258, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:24:57,922 INFO L87 Difference]: Start difference. First operand 6646 states and 17169 transitions. Second operand has 50 states, 50 states have (on average 1.92) internal successors, (96), 49 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:06,640 INFO L93 Difference]: Finished difference Result 15102 states and 36099 transitions. [2022-03-15 21:25:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2022-03-15 21:25:06,640 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.92) internal successors, (96), 49 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:25:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:06,663 INFO L225 Difference]: With dead ends: 15102 [2022-03-15 21:25:06,663 INFO L226 Difference]: Without dead ends: 14469 [2022-03-15 21:25:06,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39509 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=15310, Invalid=88696, Unknown=0, NotChecked=0, Total=104006 [2022-03-15 21:25:06,668 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 880 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 1624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1624 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:06,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 1 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1624 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 21:25:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14469 states. [2022-03-15 21:25:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14469 to 9085. [2022-03-15 21:25:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9085 states, 9084 states have (on average 2.56594011448701) internal successors, (23309), 9084 states have internal predecessors, (23309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9085 states to 9085 states and 23309 transitions. [2022-03-15 21:25:06,816 INFO L78 Accepts]: Start accepts. Automaton has 9085 states and 23309 transitions. Word has length 31 [2022-03-15 21:25:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:06,816 INFO L470 AbstractCegarLoop]: Abstraction has 9085 states and 23309 transitions. [2022-03-15 21:25:06,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.92) internal successors, (96), 49 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9085 states and 23309 transitions. [2022-03-15 21:25:06,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:25:06,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:06,825 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:06,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:07,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2022-03-15 21:25:07,040 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash 932439081, now seen corresponding path program 391 times [2022-03-15 21:25:07,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:07,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707269225] [2022-03-15 21:25:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:07,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:07,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:07,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707269225] [2022-03-15 21:25:07,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707269225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:07,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899438844] [2022-03-15 21:25:07,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:25:07,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:07,157 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:07,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-03-15 21:25:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:07,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:25:07,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:07,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:07,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899438844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:07,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:07,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 20] total 32 [2022-03-15 21:25:07,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [671552960] [2022-03-15 21:25:07,583 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:07,585 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:07,596 INFO L252 McrAutomatonBuilder]: Finished intersection with 70 states and 107 transitions. [2022-03-15 21:25:07,596 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:08,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [5049350#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 5049347#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 5049348#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 5049351#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 5049354#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 5049357#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 5049356#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 5049352#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 5049353#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 5049349#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 5049346#(< i2 (* 2 N)), 5049355#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 5049358#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11)))] [2022-03-15 21:25:08,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:25:08,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:25:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=1552, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:25:08,063 INFO L87 Difference]: Start difference. First operand 9085 states and 23309 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:27,956 INFO L93 Difference]: Finished difference Result 19576 states and 42607 transitions. [2022-03-15 21:25:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 618 states. [2022-03-15 21:25:27,956 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 21:25:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:27,983 INFO L225 Difference]: With dead ends: 19576 [2022-03-15 21:25:27,984 INFO L226 Difference]: Without dead ends: 19576 [2022-03-15 21:25:27,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 646 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191386 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=44809, Invalid=374447, Unknown=0, NotChecked=0, Total=419256 [2022-03-15 21:25:27,999 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 927 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:27,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 1 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 21:25:28,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19576 states. [2022-03-15 21:25:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19576 to 9385. [2022-03-15 21:25:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9385 states, 9384 states have (on average 2.575873827791986) internal successors, (24172), 9384 states have internal predecessors, (24172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9385 states to 9385 states and 24172 transitions. [2022-03-15 21:25:28,286 INFO L78 Accepts]: Start accepts. Automaton has 9385 states and 24172 transitions. Word has length 31 [2022-03-15 21:25:28,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:28,286 INFO L470 AbstractCegarLoop]: Abstraction has 9385 states and 24172 transitions. [2022-03-15 21:25:28,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:28,286 INFO L276 IsEmpty]: Start isEmpty. Operand 9385 states and 24172 transitions. [2022-03-15 21:25:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:28,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:28,295 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:28,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:28,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:28,511 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1495689027, now seen corresponding path program 392 times [2022-03-15 21:25:28,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:28,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210908668] [2022-03-15 21:25:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:28,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:28,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210908668] [2022-03-15 21:25:28,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210908668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:28,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913130870] [2022-03-15 21:25:28,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:25:28,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:28,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:28,736 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:28,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-03-15 21:25:28,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:25:28,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:28,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:29,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913130870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:29,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:29,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 40 [2022-03-15 21:25:29,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1305534330] [2022-03-15 21:25:29,078 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:29,080 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:29,088 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:25:29,088 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:29,413 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [5089142#(< i2 (* 2 N)), 5089149#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 5089148#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 5089146#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 5089147#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 5089143#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 5089145#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 5089154#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 11))), 5089151#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 8))), 5089144#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 5089152#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 9 i1))), 5089153#(or (<= (* 2 N) (+ i1 10)) (< i2 (* 2 N))), 5089150#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1)))] [2022-03-15 21:25:29,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 21:25:29,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 21:25:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=2048, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:25:29,414 INFO L87 Difference]: Start difference. First operand 9385 states and 24172 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 40 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 21:25:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:29,813 INFO L93 Difference]: Finished difference Result 13995 states and 34843 transitions. [2022-03-15 21:25:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:25:29,814 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 40 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 33 [2022-03-15 21:25:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:29,835 INFO L225 Difference]: With dead ends: 13995 [2022-03-15 21:25:29,835 INFO L226 Difference]: Without dead ends: 13982 [2022-03-15 21:25:29,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2026, Invalid=4454, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:25:29,836 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 320 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:29,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 1 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13982 states. [2022-03-15 21:25:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13982 to 10952. [2022-03-15 21:25:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10952 states, 10951 states have (on average 2.657108939822847) internal successors, (29098), 10951 states have internal predecessors, (29098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10952 states to 10952 states and 29098 transitions. [2022-03-15 21:25:30,047 INFO L78 Accepts]: Start accepts. Automaton has 10952 states and 29098 transitions. Word has length 33 [2022-03-15 21:25:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:30,047 INFO L470 AbstractCegarLoop]: Abstraction has 10952 states and 29098 transitions. [2022-03-15 21:25:30,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 40 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 21:25:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 10952 states and 29098 transitions. [2022-03-15 21:25:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:30,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:30,057 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:30,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:30,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:30,271 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:30,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1516520381, now seen corresponding path program 393 times [2022-03-15 21:25:30,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:30,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340214704] [2022-03-15 21:25:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:30,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:30,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:30,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340214704] [2022-03-15 21:25:30,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340214704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:30,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967288788] [2022-03-15 21:25:30,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:25:30,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:30,335 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:30,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-03-15 21:25:30,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:25:30,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:30,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:30,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:30,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:30,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967288788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:30,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:30,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:25:30,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [50831106] [2022-03-15 21:25:30,626 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:30,628 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:30,635 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:25:30,635 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:30,648 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5125335#(< i2 (* 2 N))] [2022-03-15 21:25:30,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:25:30,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:25:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:25:30,648 INFO L87 Difference]: Start difference. First operand 10952 states and 29098 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:30,912 INFO L93 Difference]: Finished difference Result 13235 states and 33086 transitions. [2022-03-15 21:25:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:25:30,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:25:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:30,934 INFO L225 Difference]: With dead ends: 13235 [2022-03-15 21:25:30,934 INFO L226 Difference]: Without dead ends: 13234 [2022-03-15 21:25:30,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=937, Invalid=1513, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:25:30,935 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 151 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:30,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13234 states. [2022-03-15 21:25:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13234 to 11000. [2022-03-15 21:25:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11000 states, 10999 states have (on average 2.656514228566233) internal successors, (29219), 10999 states have internal predecessors, (29219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11000 states to 11000 states and 29219 transitions. [2022-03-15 21:25:31,119 INFO L78 Accepts]: Start accepts. Automaton has 11000 states and 29219 transitions. Word has length 33 [2022-03-15 21:25:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:31,119 INFO L470 AbstractCegarLoop]: Abstraction has 11000 states and 29219 transitions. [2022-03-15 21:25:31,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 11000 states and 29219 transitions. [2022-03-15 21:25:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:31,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:31,130 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:31,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:31,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:31,336 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:31,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2015221721, now seen corresponding path program 394 times [2022-03-15 21:25:31,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:31,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659900592] [2022-03-15 21:25:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:31,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:31,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659900592] [2022-03-15 21:25:31,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659900592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:31,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495208272] [2022-03-15 21:25:31,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:25:31,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:31,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:31,485 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:31,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-03-15 21:25:31,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:25:31,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:31,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:31,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:31,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495208272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:31,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:31,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:25:31,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1331140381] [2022-03-15 21:25:31,849 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:31,851 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:31,858 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:31,858 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:31,901 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5160827#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:25:31,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:31,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:25:31,902 INFO L87 Difference]: Start difference. First operand 11000 states and 29219 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:32,185 INFO L93 Difference]: Finished difference Result 16277 states and 39202 transitions. [2022-03-15 21:25:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:25:32,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:32,210 INFO L225 Difference]: With dead ends: 16277 [2022-03-15 21:25:32,211 INFO L226 Difference]: Without dead ends: 16277 [2022-03-15 21:25:32,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1010, Invalid=1746, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:25:32,211 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 211 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:32,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16277 states. [2022-03-15 21:25:32,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16277 to 11004. [2022-03-15 21:25:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11004 states, 11003 states have (on average 2.6566390984277017) internal successors, (29231), 11003 states have internal predecessors, (29231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11004 states to 11004 states and 29231 transitions. [2022-03-15 21:25:32,400 INFO L78 Accepts]: Start accepts. Automaton has 11004 states and 29231 transitions. Word has length 33 [2022-03-15 21:25:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:32,400 INFO L470 AbstractCegarLoop]: Abstraction has 11004 states and 29231 transitions. [2022-03-15 21:25:32,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 11004 states and 29231 transitions. [2022-03-15 21:25:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:32,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:32,410 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:32,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-03-15 21:25:32,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:32,626 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:32,626 INFO L85 PathProgramCache]: Analyzing trace with hash -340310967, now seen corresponding path program 395 times [2022-03-15 21:25:32,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:32,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808884190] [2022-03-15 21:25:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:32,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:25:32,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:32,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808884190] [2022-03-15 21:25:32,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808884190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:32,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583458078] [2022-03-15 21:25:32,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:25:32,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:32,711 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:32,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-03-15 21:25:32,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:25:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:25:32,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:33,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583458078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:33,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:33,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 33 [2022-03-15 21:25:33,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1053168302] [2022-03-15 21:25:33,137 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:33,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:33,146 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:33,146 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:33,184 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5199372#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 5199371#(< i2 (* 2 N))] [2022-03-15 21:25:33,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:33,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:33,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:33,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=755, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:25:33,184 INFO L87 Difference]: Start difference. First operand 11004 states and 29231 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:33,442 INFO L93 Difference]: Finished difference Result 13103 states and 32904 transitions. [2022-03-15 21:25:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:25:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:33,468 INFO L225 Difference]: With dead ends: 13103 [2022-03-15 21:25:33,469 INFO L226 Difference]: Without dead ends: 13101 [2022-03-15 21:25:33,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=891, Invalid=1559, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:25:33,469 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 276 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:33,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13101 states. [2022-03-15 21:25:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13101 to 11103. [2022-03-15 21:25:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11103 states, 11102 states have (on average 2.6651053864168617) internal successors, (29588), 11102 states have internal predecessors, (29588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11103 states to 11103 states and 29588 transitions. [2022-03-15 21:25:33,664 INFO L78 Accepts]: Start accepts. Automaton has 11103 states and 29588 transitions. Word has length 33 [2022-03-15 21:25:33,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:33,664 INFO L470 AbstractCegarLoop]: Abstraction has 11103 states and 29588 transitions. [2022-03-15 21:25:33,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 11103 states and 29588 transitions. [2022-03-15 21:25:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:33,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:33,676 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:33,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:33,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:33,881 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash 635114179, now seen corresponding path program 396 times [2022-03-15 21:25:33,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:33,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313159603] [2022-03-15 21:25:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:33,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:33,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313159603] [2022-03-15 21:25:33,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313159603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:33,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165080316] [2022-03-15 21:25:33,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:25:33,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:33,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:33,975 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:33,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-03-15 21:25:34,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 21:25:34,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:34,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:34,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:34,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165080316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:34,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:34,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:25:34,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1294187373] [2022-03-15 21:25:34,255 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:34,257 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:34,296 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:25:34,296 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:34,305 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5234937#(< i2 (* 2 N))] [2022-03-15 21:25:34,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:25:34,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:34,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:25:34,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:25:34,306 INFO L87 Difference]: Start difference. First operand 11103 states and 29588 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:34,528 INFO L93 Difference]: Finished difference Result 14207 states and 35295 transitions. [2022-03-15 21:25:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:25:34,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:25:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:34,556 INFO L225 Difference]: With dead ends: 14207 [2022-03-15 21:25:34,556 INFO L226 Difference]: Without dead ends: 14204 [2022-03-15 21:25:34,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1021, Invalid=1631, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:25:34,556 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 202 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:34,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14204 states. [2022-03-15 21:25:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14204 to 11069. [2022-03-15 21:25:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11069 states, 11068 states have (on average 2.653505601734731) internal successors, (29369), 11068 states have internal predecessors, (29369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11069 states to 11069 states and 29369 transitions. [2022-03-15 21:25:34,759 INFO L78 Accepts]: Start accepts. Automaton has 11069 states and 29369 transitions. Word has length 33 [2022-03-15 21:25:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:34,759 INFO L470 AbstractCegarLoop]: Abstraction has 11069 states and 29369 transitions. [2022-03-15 21:25:34,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11069 states and 29369 transitions. [2022-03-15 21:25:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:34,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:34,772 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:34,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-03-15 21:25:34,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-03-15 21:25:34,989 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash 136412839, now seen corresponding path program 397 times [2022-03-15 21:25:34,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:34,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523897781] [2022-03-15 21:25:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:35,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:35,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523897781] [2022-03-15 21:25:35,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523897781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:35,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953944650] [2022-03-15 21:25:35,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:25:35,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:35,058 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:35,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-03-15 21:25:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:35,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:35,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953944650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:35,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:35,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:25:35,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [932039407] [2022-03-15 21:25:35,408 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:35,410 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:35,418 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:35,418 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:35,452 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5271543#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:25:35,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:35,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:35,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:35,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:25:35,453 INFO L87 Difference]: Start difference. First operand 11069 states and 29369 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:35,719 INFO L93 Difference]: Finished difference Result 15227 states and 36811 transitions. [2022-03-15 21:25:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:25:35,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:35,747 INFO L225 Difference]: With dead ends: 15227 [2022-03-15 21:25:35,747 INFO L226 Difference]: Without dead ends: 15227 [2022-03-15 21:25:35,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1008, Invalid=1748, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:25:35,747 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 166 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:35,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 1 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15227 states. [2022-03-15 21:25:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15227 to 11033. [2022-03-15 21:25:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11033 states, 11032 states have (on average 2.6479332849891226) internal successors, (29212), 11032 states have internal predecessors, (29212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11033 states to 11033 states and 29212 transitions. [2022-03-15 21:25:35,956 INFO L78 Accepts]: Start accepts. Automaton has 11033 states and 29212 transitions. Word has length 33 [2022-03-15 21:25:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:35,956 INFO L470 AbstractCegarLoop]: Abstraction has 11033 states and 29212 transitions. [2022-03-15 21:25:35,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 11033 states and 29212 transitions. [2022-03-15 21:25:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:35,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:35,968 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:35,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-03-15 21:25:36,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-03-15 21:25:36,179 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:36,179 INFO L85 PathProgramCache]: Analyzing trace with hash -718893815, now seen corresponding path program 398 times [2022-03-15 21:25:36,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:36,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377745575] [2022-03-15 21:25:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:36,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:36,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:36,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377745575] [2022-03-15 21:25:36,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377745575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:36,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991040097] [2022-03-15 21:25:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:25:36,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:36,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:36,252 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:36,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-03-15 21:25:36,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:25:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:36,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:36,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:36,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991040097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:36,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:36,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 22] total 35 [2022-03-15 21:25:36,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [343327770] [2022-03-15 21:25:36,543 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:36,545 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:36,552 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:25:36,553 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:36,605 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5309098#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 5309097#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:25:36,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:25:36,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:25:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=867, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:25:36,606 INFO L87 Difference]: Start difference. First operand 11033 states and 29212 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:25:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:36,949 INFO L93 Difference]: Finished difference Result 16416 states and 39421 transitions. [2022-03-15 21:25:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:25:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:25:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:36,973 INFO L225 Difference]: With dead ends: 16416 [2022-03-15 21:25:36,973 INFO L226 Difference]: Without dead ends: 16416 [2022-03-15 21:25:36,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1129, Invalid=2177, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:25:36,974 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 191 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:36,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16416 states. [2022-03-15 21:25:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16416 to 11044. [2022-03-15 21:25:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11044 states, 11043 states have (on average 2.648283980802318) internal successors, (29245), 11043 states have internal predecessors, (29245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 29245 transitions. [2022-03-15 21:25:37,172 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 29245 transitions. Word has length 33 [2022-03-15 21:25:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:37,172 INFO L470 AbstractCegarLoop]: Abstraction has 11044 states and 29245 transitions. [2022-03-15 21:25:37,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:25:37,172 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 29245 transitions. [2022-03-15 21:25:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:37,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:37,184 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:37,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-03-15 21:25:37,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-03-15 21:25:37,397 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash -748175385, now seen corresponding path program 399 times [2022-03-15 21:25:37,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:37,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907344394] [2022-03-15 21:25:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:25:37,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:37,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907344394] [2022-03-15 21:25:37,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907344394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:37,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454101474] [2022-03-15 21:25:37,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:25:37,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:37,491 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:37,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-03-15 21:25:37,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:25:37,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:37,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:37,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:25:37,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:37,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454101474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:37,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:37,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 22] total 34 [2022-03-15 21:25:37,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [88965392] [2022-03-15 21:25:37,837 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:37,839 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:37,846 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:37,846 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:37,869 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5347871#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 5347870#(< i2 (* 2 N))] [2022-03-15 21:25:37,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:37,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:37,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:37,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=793, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:25:37,869 INFO L87 Difference]: Start difference. First operand 11044 states and 29245 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:38,077 INFO L93 Difference]: Finished difference Result 13806 states and 34314 transitions. [2022-03-15 21:25:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:25:38,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:38,105 INFO L225 Difference]: With dead ends: 13806 [2022-03-15 21:25:38,105 INFO L226 Difference]: Without dead ends: 13804 [2022-03-15 21:25:38,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1013, Invalid=1743, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:25:38,105 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 187 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:38,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2022-03-15 21:25:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 11140. [2022-03-15 21:25:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11140 states, 11139 states have (on average 2.656073256127121) internal successors, (29586), 11139 states have internal predecessors, (29586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11140 states to 11140 states and 29586 transitions. [2022-03-15 21:25:38,284 INFO L78 Accepts]: Start accepts. Automaton has 11140 states and 29586 transitions. Word has length 33 [2022-03-15 21:25:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:38,284 INFO L470 AbstractCegarLoop]: Abstraction has 11140 states and 29586 transitions. [2022-03-15 21:25:38,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 11140 states and 29586 transitions. [2022-03-15 21:25:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:38,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:38,294 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:38,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Ended with exit code 0 [2022-03-15 21:25:38,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-03-15 21:25:38,510 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:38,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1383691197, now seen corresponding path program 400 times [2022-03-15 21:25:38,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:38,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699499697] [2022-03-15 21:25:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:38,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:38,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:38,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699499697] [2022-03-15 21:25:38,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699499697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:38,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245538475] [2022-03-15 21:25:38,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:25:38,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:38,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:38,597 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:38,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-03-15 21:25:38,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:25:38,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:38,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:38,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:38,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245538475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:38,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:38,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:25:38,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [280798437] [2022-03-15 21:25:38,944 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:38,946 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:38,953 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:25:38,953 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:38,963 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5384217#(< i2 (* 2 N))] [2022-03-15 21:25:38,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:25:38,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:25:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:25:38,964 INFO L87 Difference]: Start difference. First operand 11140 states and 29586 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:39,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:39,196 INFO L93 Difference]: Finished difference Result 14947 states and 36816 transitions. [2022-03-15 21:25:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:25:39,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:25:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:39,220 INFO L225 Difference]: With dead ends: 14947 [2022-03-15 21:25:39,221 INFO L226 Difference]: Without dead ends: 14943 [2022-03-15 21:25:39,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1100, Invalid=1762, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:25:39,221 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 198 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:39,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14943 states. [2022-03-15 21:25:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14943 to 11125. [2022-03-15 21:25:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11125 states, 11124 states have (on average 2.64868752247393) internal successors, (29464), 11124 states have internal predecessors, (29464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11125 states to 11125 states and 29464 transitions. [2022-03-15 21:25:39,427 INFO L78 Accepts]: Start accepts. Automaton has 11125 states and 29464 transitions. Word has length 33 [2022-03-15 21:25:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:39,427 INFO L470 AbstractCegarLoop]: Abstraction has 11125 states and 29464 transitions. [2022-03-15 21:25:39,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 11125 states and 29464 transitions. [2022-03-15 21:25:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:39,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:39,438 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:39,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:39,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2022-03-15 21:25:39,654 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1882392537, now seen corresponding path program 401 times [2022-03-15 21:25:39,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:39,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442938333] [2022-03-15 21:25:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:39,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:39,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:39,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442938333] [2022-03-15 21:25:39,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442938333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:39,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092150246] [2022-03-15 21:25:39,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:25:39,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:39,743 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:39,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-03-15 21:25:39,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:25:39,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:39,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:39,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:40,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092150246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:40,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:40,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:25:40,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1014591921] [2022-03-15 21:25:40,121 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:40,124 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:40,131 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:40,131 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:40,187 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5421679#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:25:40,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:40,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:25:40,188 INFO L87 Difference]: Start difference. First operand 11125 states and 29464 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:40,527 INFO L93 Difference]: Finished difference Result 16495 states and 39538 transitions. [2022-03-15 21:25:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:25:40,527 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:40,559 INFO L225 Difference]: With dead ends: 16495 [2022-03-15 21:25:40,559 INFO L226 Difference]: Without dead ends: 16491 [2022-03-15 21:25:40,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1086, Invalid=1884, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:25:40,560 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 204 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:40,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16491 states. [2022-03-15 21:25:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16491 to 11079. [2022-03-15 21:25:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11079 states, 11078 states have (on average 2.6441595955948727) internal successors, (29292), 11078 states have internal predecessors, (29292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 29292 transitions. [2022-03-15 21:25:40,825 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 29292 transitions. Word has length 33 [2022-03-15 21:25:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:40,825 INFO L470 AbstractCegarLoop]: Abstraction has 11079 states and 29292 transitions. [2022-03-15 21:25:40,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 29292 transitions. [2022-03-15 21:25:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:40,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:40,837 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:40,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-03-15 21:25:41,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:41,041 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1557268105, now seen corresponding path program 402 times [2022-03-15 21:25:41,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:41,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331534851] [2022-03-15 21:25:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:41,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:41,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331534851] [2022-03-15 21:25:41,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331534851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:41,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688542121] [2022-03-15 21:25:41,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:25:41,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:41,189 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:41,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-03-15 21:25:41,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:25:41,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:41,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:41,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:41,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:41,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688542121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:41,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:41,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 23] total 36 [2022-03-15 21:25:41,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [640585334] [2022-03-15 21:25:41,637 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:41,641 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:41,651 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:25:41,651 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:41,740 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5460598#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 5460599#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:25:41,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:25:41,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:25:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=911, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:25:41,740 INFO L87 Difference]: Start difference. First operand 11079 states and 29292 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:25:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:42,162 INFO L93 Difference]: Finished difference Result 15066 states and 36358 transitions. [2022-03-15 21:25:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:25:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:25:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:42,192 INFO L225 Difference]: With dead ends: 15066 [2022-03-15 21:25:42,192 INFO L226 Difference]: Without dead ends: 15066 [2022-03-15 21:25:42,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1160, Invalid=2262, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:25:42,193 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 181 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:42,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15066 states. [2022-03-15 21:25:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15066 to 11024. [2022-03-15 21:25:42,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11024 states, 11023 states have (on average 2.6365780640479) internal successors, (29063), 11023 states have internal predecessors, (29063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11024 states to 11024 states and 29063 transitions. [2022-03-15 21:25:42,381 INFO L78 Accepts]: Start accepts. Automaton has 11024 states and 29063 transitions. Word has length 33 [2022-03-15 21:25:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:42,381 INFO L470 AbstractCegarLoop]: Abstraction has 11024 states and 29063 transitions. [2022-03-15 21:25:42,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:25:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 11024 states and 29063 transitions. [2022-03-15 21:25:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:42,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:42,393 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:42,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-03-15 21:25:42,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2022-03-15 21:25:42,607 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash 812565607, now seen corresponding path program 403 times [2022-03-15 21:25:42,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:42,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747349369] [2022-03-15 21:25:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:42,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:42,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747349369] [2022-03-15 21:25:42,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747349369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:42,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426137896] [2022-03-15 21:25:42,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:25:42,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:42,681 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:42,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-03-15 21:25:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:42,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:42,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:42,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426137896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:42,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:42,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:25:42,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1306476415] [2022-03-15 21:25:42,990 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:42,992 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:43,000 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:25:43,000 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:43,076 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [5497983#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 5497984#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 5497985#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:25:43,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:25:43,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:25:43,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:25:43,077 INFO L87 Difference]: Start difference. First operand 11024 states and 29063 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:25:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:43,506 INFO L93 Difference]: Finished difference Result 16285 states and 39069 transitions. [2022-03-15 21:25:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:25:43,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:25:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:43,536 INFO L225 Difference]: With dead ends: 16285 [2022-03-15 21:25:43,536 INFO L226 Difference]: Without dead ends: 16285 [2022-03-15 21:25:43,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1623, Invalid=3489, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:25:43,537 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 255 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:43,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 1 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16285 states. [2022-03-15 21:25:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16285 to 11042. [2022-03-15 21:25:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11042 states, 11041 states have (on average 2.6370799746399785) internal successors, (29116), 11041 states have internal predecessors, (29116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11042 states to 11042 states and 29116 transitions. [2022-03-15 21:25:43,747 INFO L78 Accepts]: Start accepts. Automaton has 11042 states and 29116 transitions. Word has length 33 [2022-03-15 21:25:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:43,747 INFO L470 AbstractCegarLoop]: Abstraction has 11042 states and 29116 transitions. [2022-03-15 21:25:43,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:25:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11042 states and 29116 transitions. [2022-03-15 21:25:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:43,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:43,757 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:43,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-03-15 21:25:43,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:43,973 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:43,973 INFO L85 PathProgramCache]: Analyzing trace with hash -507070455, now seen corresponding path program 404 times [2022-03-15 21:25:43,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:43,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440613427] [2022-03-15 21:25:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:43,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:25:44,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:44,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440613427] [2022-03-15 21:25:44,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440613427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:44,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949333213] [2022-03-15 21:25:44,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:25:44,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:44,031 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:44,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-03-15 21:25:44,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:25:44,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:44,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:44,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:25:44,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:44,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949333213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:44,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:44,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 33 [2022-03-15 21:25:44,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [275924694] [2022-03-15 21:25:44,330 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:44,332 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:44,339 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:44,339 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:44,369 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5536645#(< i2 (* 2 N)), 5536646#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:25:44,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:44,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:44,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:25:44,369 INFO L87 Difference]: Start difference. First operand 11042 states and 29116 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:44,655 INFO L93 Difference]: Finished difference Result 14348 states and 35345 transitions. [2022-03-15 21:25:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:25:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:44,682 INFO L225 Difference]: With dead ends: 14348 [2022-03-15 21:25:44,682 INFO L226 Difference]: Without dead ends: 14344 [2022-03-15 21:25:44,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:25:44,683 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 196 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:44,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14344 states. [2022-03-15 21:25:44,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14344 to 11136. [2022-03-15 21:25:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11136 states, 11135 states have (on average 2.6443646160754377) internal successors, (29445), 11135 states have internal predecessors, (29445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11136 states to 11136 states and 29445 transitions. [2022-03-15 21:25:44,880 INFO L78 Accepts]: Start accepts. Automaton has 11136 states and 29445 transitions. Word has length 33 [2022-03-15 21:25:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:44,880 INFO L470 AbstractCegarLoop]: Abstraction has 11136 states and 29445 transitions. [2022-03-15 21:25:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 11136 states and 29445 transitions. [2022-03-15 21:25:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:44,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:44,891 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:44,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-03-15 21:25:45,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:45,107 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash 457851587, now seen corresponding path program 405 times [2022-03-15 21:25:45,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:45,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907460183] [2022-03-15 21:25:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 118 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:45,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:45,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907460183] [2022-03-15 21:25:45,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907460183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:45,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529228914] [2022-03-15 21:25:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:25:45,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:45,186 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:45,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-03-15 21:25:45,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-15 21:25:45,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:45,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 118 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:45,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 118 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:45,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529228914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:45,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:45,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:25:45,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [420582598] [2022-03-15 21:25:45,545 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:45,547 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:45,554 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:25:45,554 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:45,570 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5573530#(< i2 (* 2 N))] [2022-03-15 21:25:45,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:25:45,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:25:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:25:45,571 INFO L87 Difference]: Start difference. First operand 11136 states and 29445 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:45,840 INFO L93 Difference]: Finished difference Result 15420 states and 37749 transitions. [2022-03-15 21:25:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:25:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:25:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:45,868 INFO L225 Difference]: With dead ends: 15420 [2022-03-15 21:25:45,868 INFO L226 Difference]: Without dead ends: 15416 [2022-03-15 21:25:45,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1177, Invalid=1903, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:25:45,869 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 148 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:45,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15416 states. [2022-03-15 21:25:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15416 to 11136. [2022-03-15 21:25:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11136 states, 11135 states have (on average 2.6397844634036822) internal successors, (29394), 11135 states have internal predecessors, (29394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11136 states to 11136 states and 29394 transitions. [2022-03-15 21:25:46,073 INFO L78 Accepts]: Start accepts. Automaton has 11136 states and 29394 transitions. Word has length 33 [2022-03-15 21:25:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:46,073 INFO L470 AbstractCegarLoop]: Abstraction has 11136 states and 29394 transitions. [2022-03-15 21:25:46,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 11136 states and 29394 transitions. [2022-03-15 21:25:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:46,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:46,084 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:46,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-03-15 21:25:46,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2022-03-15 21:25:46,288 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash -40849753, now seen corresponding path program 406 times [2022-03-15 21:25:46,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:46,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878474071] [2022-03-15 21:25:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:46,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:46,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:46,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878474071] [2022-03-15 21:25:46,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878474071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:46,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039824031] [2022-03-15 21:25:46,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:25:46,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:46,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:46,386 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:46,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-03-15 21:25:46,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:25:46,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:46,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:46,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 112 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:46,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039824031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:46,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:46,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:25:46,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2059689616] [2022-03-15 21:25:46,814 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:46,816 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:46,824 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:46,824 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:46,878 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5611491#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:25:46,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:46,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:46,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:25:46,879 INFO L87 Difference]: Start difference. First operand 11136 states and 29394 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:47,209 INFO L93 Difference]: Finished difference Result 17404 states and 41504 transitions. [2022-03-15 21:25:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:25:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:47,237 INFO L225 Difference]: With dead ends: 17404 [2022-03-15 21:25:47,237 INFO L226 Difference]: Without dead ends: 17400 [2022-03-15 21:25:47,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1119, Invalid=1961, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:25:47,237 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 151 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:47,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17400 states. [2022-03-15 21:25:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17400 to 11132. [2022-03-15 21:25:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11132 states, 11131 states have (on average 2.638756625640104) internal successors, (29372), 11131 states have internal predecessors, (29372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 29372 transitions. [2022-03-15 21:25:47,449 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 29372 transitions. Word has length 33 [2022-03-15 21:25:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:47,449 INFO L470 AbstractCegarLoop]: Abstraction has 11132 states and 29372 transitions. [2022-03-15 21:25:47,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 29372 transitions. [2022-03-15 21:25:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:47,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:47,460 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:47,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-03-15 21:25:47,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:47,676 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:47,676 INFO L85 PathProgramCache]: Analyzing trace with hash -896156407, now seen corresponding path program 407 times [2022-03-15 21:25:47,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:47,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809107815] [2022-03-15 21:25:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:47,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:47,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:47,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809107815] [2022-03-15 21:25:47,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809107815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:47,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121426286] [2022-03-15 21:25:47,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:25:47,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:47,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:47,742 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:47,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-03-15 21:25:47,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-15 21:25:47,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:47,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:47,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:47,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:48,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121426286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:48,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:48,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 22] total 35 [2022-03-15 21:25:48,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1119529581] [2022-03-15 21:25:48,015 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:48,017 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:48,025 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:25:48,025 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:48,079 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5651426#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 5651427#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:25:48,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:25:48,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:25:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=867, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:25:48,080 INFO L87 Difference]: Start difference. First operand 11132 states and 29372 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:25:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:48,416 INFO L93 Difference]: Finished difference Result 16669 states and 39799 transitions. [2022-03-15 21:25:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:25:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:25:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:48,453 INFO L225 Difference]: With dead ends: 16669 [2022-03-15 21:25:48,453 INFO L226 Difference]: Without dead ends: 16663 [2022-03-15 21:25:48,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1237, Invalid=2423, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:25:48,454 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 201 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:48,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 1 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16663 states. [2022-03-15 21:25:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16663 to 11092. [2022-03-15 21:25:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11092 states, 11091 states have (on average 2.635109548282391) internal successors, (29226), 11091 states have internal predecessors, (29226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 29226 transitions. [2022-03-15 21:25:48,675 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 29226 transitions. Word has length 33 [2022-03-15 21:25:48,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:48,675 INFO L470 AbstractCegarLoop]: Abstraction has 11092 states and 29226 transitions. [2022-03-15 21:25:48,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:25:48,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 29226 transitions. [2022-03-15 21:25:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:48,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:48,686 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:48,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:48,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:48,902 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:48,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:48,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1640858905, now seen corresponding path program 408 times [2022-03-15 21:25:48,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:48,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707478814] [2022-03-15 21:25:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:48,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:48,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:48,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707478814] [2022-03-15 21:25:48,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707478814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:48,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293506452] [2022-03-15 21:25:48,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:25:48,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:48,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:48,995 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:48,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-03-15 21:25:49,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 21:25:49,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:49,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:49,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 98 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:49,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293506452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:49,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:49,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:25:49,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1306819198] [2022-03-15 21:25:49,402 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:49,404 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:49,412 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:25:49,412 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:49,495 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [5690556#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 5690557#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 5690558#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:25:49,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:25:49,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:49,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:25:49,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:25:49,496 INFO L87 Difference]: Start difference. First operand 11092 states and 29226 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:25:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:49,964 INFO L93 Difference]: Finished difference Result 14880 states and 35859 transitions. [2022-03-15 21:25:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:25:49,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:25:49,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:49,992 INFO L225 Difference]: With dead ends: 14880 [2022-03-15 21:25:49,992 INFO L226 Difference]: Without dead ends: 14880 [2022-03-15 21:25:49,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1594, Invalid=3518, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:25:49,993 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 191 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:49,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14880 states. [2022-03-15 21:25:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14880 to 11064. [2022-03-15 21:25:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11064 states, 11063 states have (on average 2.6231582753321883) internal successors, (29020), 11063 states have internal predecessors, (29020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11064 states to 11064 states and 29020 transitions. [2022-03-15 21:25:50,261 INFO L78 Accepts]: Start accepts. Automaton has 11064 states and 29020 transitions. Word has length 33 [2022-03-15 21:25:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:50,261 INFO L470 AbstractCegarLoop]: Abstraction has 11064 states and 29020 transitions. [2022-03-15 21:25:50,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:25:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 11064 states and 29020 transitions. [2022-03-15 21:25:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:50,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:50,272 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:50,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Ended with exit code 0 [2022-03-15 21:25:50,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-03-15 21:25:50,476 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1043167433, now seen corresponding path program 409 times [2022-03-15 21:25:50,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:50,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755525953] [2022-03-15 21:25:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:50,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:50,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:50,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755525953] [2022-03-15 21:25:50,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755525953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:50,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096470751] [2022-03-15 21:25:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:25:50,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:50,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:50,600 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:50,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-03-15 21:25:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:50,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:50,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:51,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096470751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:51,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:51,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 36 [2022-03-15 21:25:51,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [884959967] [2022-03-15 21:25:51,028 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:51,030 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:51,038 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:25:51,038 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:51,171 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [5727861#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 5727860#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 5727863#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 5727862#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:25:51,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:25:51,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:51,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:25:51,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:25:51,172 INFO L87 Difference]: Start difference. First operand 11064 states and 29020 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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 21:25:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:51,870 INFO L93 Difference]: Finished difference Result 16031 states and 38464 transitions. [2022-03-15 21:25:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 21:25:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 33 [2022-03-15 21:25:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:51,899 INFO L225 Difference]: With dead ends: 16031 [2022-03-15 21:25:51,899 INFO L226 Difference]: Without dead ends: 16031 [2022-03-15 21:25:51,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:25:51,900 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 265 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:51,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:25:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16031 states. [2022-03-15 21:25:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16031 to 11088. [2022-03-15 21:25:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11088 states, 11087 states have (on average 2.6238838279065573) internal successors, (29091), 11087 states have internal predecessors, (29091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11088 states to 11088 states and 29091 transitions. [2022-03-15 21:25:52,109 INFO L78 Accepts]: Start accepts. Automaton has 11088 states and 29091 transitions. Word has length 33 [2022-03-15 21:25:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:52,109 INFO L470 AbstractCegarLoop]: Abstraction has 11088 states and 29091 transitions. [2022-03-15 21:25:52,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 21:25:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 11088 states and 29091 transitions. [2022-03-15 21:25:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:52,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:52,121 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:52,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-03-15 21:25:52,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-03-15 21:25:52,326 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1622752217, now seen corresponding path program 410 times [2022-03-15 21:25:52,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:52,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587727195] [2022-03-15 21:25:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:52,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:25:52,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:52,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587727195] [2022-03-15 21:25:52,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587727195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:52,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6499069] [2022-03-15 21:25:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:25:52,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:52,437 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:52,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-03-15 21:25:52,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:25:52,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:52,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:25:52,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:52,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6499069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:52,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:52,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 22] total 34 [2022-03-15 21:25:52,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1857651238] [2022-03-15 21:25:52,827 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:52,830 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:52,838 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:52,838 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:52,869 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5766367#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 5766366#(< i2 (* 2 N))] [2022-03-15 21:25:52,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:52,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:52,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=788, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:25:52,870 INFO L87 Difference]: Start difference. First operand 11088 states and 29091 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:53,191 INFO L93 Difference]: Finished difference Result 14775 states and 36134 transitions. [2022-03-15 21:25:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:25:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:53,221 INFO L225 Difference]: With dead ends: 14775 [2022-03-15 21:25:53,222 INFO L226 Difference]: Without dead ends: 14771 [2022-03-15 21:25:53,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1176, Invalid=2016, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:25:53,222 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 153 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:53,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14771 states. [2022-03-15 21:25:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14771 to 11181. [2022-03-15 21:25:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11181 states, 11180 states have (on average 2.630679785330948) internal successors, (29411), 11180 states have internal predecessors, (29411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 29411 transitions. [2022-03-15 21:25:53,451 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 29411 transitions. Word has length 33 [2022-03-15 21:25:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:53,452 INFO L470 AbstractCegarLoop]: Abstraction has 11181 states and 29411 transitions. [2022-03-15 21:25:53,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 29411 transitions. [2022-03-15 21:25:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:53,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:53,464 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:53,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-03-15 21:25:53,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:53,680 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:53,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1711103043, now seen corresponding path program 411 times [2022-03-15 21:25:53,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:53,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901248737] [2022-03-15 21:25:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:53,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:53,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:53,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901248737] [2022-03-15 21:25:53,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901248737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:53,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050588926] [2022-03-15 21:25:53,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:25:53,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:53,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:53,755 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:53,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-03-15 21:25:53,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-15 21:25:53,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:53,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:54,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050588926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:54,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:54,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:25:54,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1562881230] [2022-03-15 21:25:54,064 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:54,066 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:54,074 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:25:54,074 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:54,088 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5803772#(< i2 (* 2 N))] [2022-03-15 21:25:54,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:25:54,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:54,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:25:54,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:25:54,089 INFO L87 Difference]: Start difference. First operand 11181 states and 29411 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:54,429 INFO L93 Difference]: Finished difference Result 15768 states and 38381 transitions. [2022-03-15 21:25:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:25:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:25:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:54,461 INFO L225 Difference]: With dead ends: 15768 [2022-03-15 21:25:54,462 INFO L226 Difference]: Without dead ends: 15764 [2022-03-15 21:25:54,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1250, Invalid=2056, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:25:54,462 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 178 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:54,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15764 states. [2022-03-15 21:25:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15764 to 11181. [2022-03-15 21:25:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11181 states, 11180 states have (on average 2.626654740608229) internal successors, (29366), 11180 states have internal predecessors, (29366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 29366 transitions. [2022-03-15 21:25:54,676 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 29366 transitions. Word has length 33 [2022-03-15 21:25:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:54,676 INFO L470 AbstractCegarLoop]: Abstraction has 11181 states and 29366 transitions. [2022-03-15 21:25:54,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 29366 transitions. [2022-03-15 21:25:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:54,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:54,687 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:54,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:54,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:54,896 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1212401703, now seen corresponding path program 412 times [2022-03-15 21:25:54,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:54,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666091694] [2022-03-15 21:25:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:54,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 115 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:55,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:55,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666091694] [2022-03-15 21:25:55,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666091694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:55,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415631962] [2022-03-15 21:25:55,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:25:55,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:55,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:55,001 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:55,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-03-15 21:25:55,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:25:55,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 115 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:55,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 115 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:55,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415631962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:55,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:55,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:25:55,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2134014970] [2022-03-15 21:25:55,403 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:55,405 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:55,413 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:25:55,413 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:55,502 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5842175#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:25:55,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:25:55,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:55,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:25:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:25:55,503 INFO L87 Difference]: Start difference. First operand 11181 states and 29366 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:55,852 INFO L93 Difference]: Finished difference Result 18026 states and 42808 transitions. [2022-03-15 21:25:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:25:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:25:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:55,880 INFO L225 Difference]: With dead ends: 18026 [2022-03-15 21:25:55,881 INFO L226 Difference]: Without dead ends: 18022 [2022-03-15 21:25:55,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1150, Invalid=2042, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:25:55,881 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 181 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:55,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18022 states. [2022-03-15 21:25:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18022 to 11195. [2022-03-15 21:25:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11195 states, 11194 states have (on average 2.6270323387529033) internal successors, (29407), 11194 states have internal predecessors, (29407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11195 states to 11195 states and 29407 transitions. [2022-03-15 21:25:56,091 INFO L78 Accepts]: Start accepts. Automaton has 11195 states and 29407 transitions. Word has length 33 [2022-03-15 21:25:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:56,091 INFO L470 AbstractCegarLoop]: Abstraction has 11195 states and 29407 transitions. [2022-03-15 21:25:56,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:25:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand 11195 states and 29407 transitions. [2022-03-15 21:25:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:56,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:56,104 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:56,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-03-15 21:25:56,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-03-15 21:25:56,319 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash 357095049, now seen corresponding path program 413 times [2022-03-15 21:25:56,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:56,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719662858] [2022-03-15 21:25:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 109 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:56,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:56,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719662858] [2022-03-15 21:25:56,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719662858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:56,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808211518] [2022-03-15 21:25:56,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:25:56,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:56,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:56,446 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:56,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-03-15 21:25:56,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-15 21:25:56,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 109 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:56,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 109 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:56,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808211518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:56,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:56,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 23] total 36 [2022-03-15 21:25:56,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [731559798] [2022-03-15 21:25:56,843 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:56,845 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:56,853 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:25:56,853 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:56,914 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5882861#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 5882862#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:25:56,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:25:56,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:25:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=911, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:25:56,915 INFO L87 Difference]: Start difference. First operand 11195 states and 29407 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:25:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:57,268 INFO L93 Difference]: Finished difference Result 17905 states and 42427 transitions. [2022-03-15 21:25:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:25:57,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:25:57,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:57,300 INFO L225 Difference]: With dead ends: 17905 [2022-03-15 21:25:57,300 INFO L226 Difference]: Without dead ends: 17899 [2022-03-15 21:25:57,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1351, Invalid=2681, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:25:57,301 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 184 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:57,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:25:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17899 states. [2022-03-15 21:25:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17899 to 11199. [2022-03-15 21:25:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11199 states, 11198 states have (on average 2.626629755313449) internal successors, (29413), 11198 states have internal predecessors, (29413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11199 states to 11199 states and 29413 transitions. [2022-03-15 21:25:57,510 INFO L78 Accepts]: Start accepts. Automaton has 11199 states and 29413 transitions. Word has length 33 [2022-03-15 21:25:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 11199 states and 29413 transitions. [2022-03-15 21:25:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:25:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 11199 states and 29413 transitions. [2022-03-15 21:25:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:57,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:57,521 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:57,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Forceful destruction successful, exit code 0 [2022-03-15 21:25:57,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2022-03-15 21:25:57,737 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:57,737 INFO L85 PathProgramCache]: Analyzing trace with hash -387607449, now seen corresponding path program 414 times [2022-03-15 21:25:57,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:57,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220573430] [2022-03-15 21:25:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:57,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:57,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:57,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220573430] [2022-03-15 21:25:57,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220573430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:57,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27688262] [2022-03-15 21:25:57,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:25:57,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:57,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:57,861 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:57,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-03-15 21:25:57,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-15 21:25:57,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:25:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:57,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:58,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27688262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:58,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:58,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:25:58,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1805765866] [2022-03-15 21:25:58,297 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:58,299 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:58,307 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:25:58,307 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:25:58,404 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [5923447#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 5923445#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 5923446#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:25:58,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:25:58,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:25:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:25:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:25:58,405 INFO L87 Difference]: Start difference. First operand 11199 states and 29413 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:25:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:25:58,972 INFO L93 Difference]: Finished difference Result 16778 states and 39887 transitions. [2022-03-15 21:25:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:25:58,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:25:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:25:59,000 INFO L225 Difference]: With dead ends: 16778 [2022-03-15 21:25:59,001 INFO L226 Difference]: Without dead ends: 16770 [2022-03-15 21:25:59,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1761, Invalid=3939, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:25:59,001 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 223 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:25:59,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 1 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:25:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16770 states. [2022-03-15 21:25:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16770 to 11150. [2022-03-15 21:25:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11150 states, 11149 states have (on average 2.623105211229707) internal successors, (29245), 11149 states have internal predecessors, (29245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:25:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11150 states to 11150 states and 29245 transitions. [2022-03-15 21:25:59,200 INFO L78 Accepts]: Start accepts. Automaton has 11150 states and 29245 transitions. Word has length 33 [2022-03-15 21:25:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:25:59,200 INFO L470 AbstractCegarLoop]: Abstraction has 11150 states and 29245 transitions. [2022-03-15 21:25:59,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:25:59,200 INFO L276 IsEmpty]: Start isEmpty. Operand 11150 states and 29245 transitions. [2022-03-15 21:25:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:25:59,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:25:59,211 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:25:59,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-03-15 21:25:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:59,420 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:25:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:25:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1998548407, now seen corresponding path program 415 times [2022-03-15 21:25:59,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:25:59,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840319514] [2022-03-15 21:25:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:25:59,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:25:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:59,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:25:59,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840319514] [2022-03-15 21:25:59,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840319514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:25:59,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351824032] [2022-03-15 21:25:59,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:25:59,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:25:59,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:25:59,547 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:25:59,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-03-15 21:25:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:25:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:25:59,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:25:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:25:59,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:25:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:25:59,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351824032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:25:59,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:25:59,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 37 [2022-03-15 21:25:59,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1245810970] [2022-03-15 21:25:59,958 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:25:59,960 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:25:59,968 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:25:59,969 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:00,124 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [5962828#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 5962830#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 5962831#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 5962829#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:26:00,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:26:00,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:26:00,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:26:00,125 INFO L87 Difference]: Start difference. First operand 11150 states and 29245 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:00,685 INFO L93 Difference]: Finished difference Result 14709 states and 35392 transitions. [2022-03-15 21:26:00,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:26:00,686 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 33 [2022-03-15 21:26:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:00,715 INFO L225 Difference]: With dead ends: 14709 [2022-03-15 21:26:00,715 INFO L226 Difference]: Without dead ends: 14709 [2022-03-15 21:26:00,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1721, Invalid=3979, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:26:00,716 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 213 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:00,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14709 states. [2022-03-15 21:26:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14709 to 11090. [2022-03-15 21:26:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11090 states, 11089 states have (on average 2.6115068987284697) internal successors, (28959), 11089 states have internal predecessors, (28959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11090 states to 11090 states and 28959 transitions. [2022-03-15 21:26:00,919 INFO L78 Accepts]: Start accepts. Automaton has 11090 states and 28959 transitions. Word has length 33 [2022-03-15 21:26:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:00,920 INFO L470 AbstractCegarLoop]: Abstraction has 11090 states and 28959 transitions. [2022-03-15 21:26:00,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 11090 states and 28959 transitions. [2022-03-15 21:26:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:00,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:00,932 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:00,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:01,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2022-03-15 21:26:01,148 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:01,148 INFO L85 PathProgramCache]: Analyzing trace with hash -398110553, now seen corresponding path program 416 times [2022-03-15 21:26:01,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:01,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078092122] [2022-03-15 21:26:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:01,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:01,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:01,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078092122] [2022-03-15 21:26:01,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078092122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:01,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819082493] [2022-03-15 21:26:01,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:26:01,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:01,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:01,315 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:01,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-03-15 21:26:01,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:26:01,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:01,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:01,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:01,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819082493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:01,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:01,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:26:01,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1288241231] [2022-03-15 21:26:01,709 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:01,711 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:01,719 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 57 transitions. [2022-03-15 21:26:01,719 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:01,901 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [6000019#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6000021#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6000023#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 6000020#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6000022#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:26:01,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:26:01,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:01,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:26:01,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:26:01,902 INFO L87 Difference]: Start difference. First operand 11090 states and 28959 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:02,875 INFO L93 Difference]: Finished difference Result 15669 states and 37638 transitions. [2022-03-15 21:26:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 21:26:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 33 [2022-03-15 21:26:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:02,906 INFO L225 Difference]: With dead ends: 15669 [2022-03-15 21:26:02,906 INFO L226 Difference]: Without dead ends: 15669 [2022-03-15 21:26:02,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3065 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2679, Invalid=6633, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 21:26:02,908 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 298 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:02,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15669 states. [2022-03-15 21:26:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15669 to 11120. [2022-03-15 21:26:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11120 states, 11119 states have (on average 2.612465149743682) internal successors, (29048), 11119 states have internal predecessors, (29048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11120 states to 11120 states and 29048 transitions. [2022-03-15 21:26:03,098 INFO L78 Accepts]: Start accepts. Automaton has 11120 states and 29048 transitions. Word has length 33 [2022-03-15 21:26:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:03,098 INFO L470 AbstractCegarLoop]: Abstraction has 11120 states and 29048 transitions. [2022-03-15 21:26:03,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 11120 states and 29048 transitions. [2022-03-15 21:26:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:03,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:03,109 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:03,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:03,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:03,325 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:03,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1849148471, now seen corresponding path program 417 times [2022-03-15 21:26:03,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:03,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108455405] [2022-03-15 21:26:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:03,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:26:03,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:03,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108455405] [2022-03-15 21:26:03,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108455405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:03,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033396478] [2022-03-15 21:26:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:26:03,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:03,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:03,389 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:03,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-03-15 21:26:03,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-15 21:26:03,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:03,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:26:03,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:03,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033396478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:03,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:03,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 33 [2022-03-15 21:26:03,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [87699521] [2022-03-15 21:26:03,636 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:03,638 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:03,645 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:26:03,646 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:03,669 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [6038267#(< i2 (* 2 N)), 6038268#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:26:03,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:26:03,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:26:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=745, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:26:03,670 INFO L87 Difference]: Start difference. First operand 11120 states and 29048 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:03,917 INFO L93 Difference]: Finished difference Result 15081 states and 36650 transitions. [2022-03-15 21:26:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:26:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:26:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:03,942 INFO L225 Difference]: With dead ends: 15081 [2022-03-15 21:26:03,943 INFO L226 Difference]: Without dead ends: 15077 [2022-03-15 21:26:03,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2100, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:26:03,943 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 152 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:03,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15077 states. [2022-03-15 21:26:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15077 to 11212. [2022-03-15 21:26:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11212 states, 11211 states have (on average 2.6187672821336188) internal successors, (29359), 11211 states have internal predecessors, (29359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11212 states to 11212 states and 29359 transitions. [2022-03-15 21:26:04,197 INFO L78 Accepts]: Start accepts. Automaton has 11212 states and 29359 transitions. Word has length 33 [2022-03-15 21:26:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:04,197 INFO L470 AbstractCegarLoop]: Abstraction has 11212 states and 29359 transitions. [2022-03-15 21:26:04,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 11212 states and 29359 transitions. [2022-03-15 21:26:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:04,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:04,207 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:04,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:04,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2022-03-15 21:26:04,423 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1907192515, now seen corresponding path program 418 times [2022-03-15 21:26:04,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:04,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812932533] [2022-03-15 21:26:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:04,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:04,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:04,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812932533] [2022-03-15 21:26:04,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812932533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:04,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069187568] [2022-03-15 21:26:04,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:26:04,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:04,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:04,498 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:04,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-03-15 21:26:04,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:26:04,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:04,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:04,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:04,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069187568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:04,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:04,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:26:04,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2101733249] [2022-03-15 21:26:04,819 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:04,821 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:04,828 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:26:04,828 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:04,845 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6076045#(< i2 (* 2 N))] [2022-03-15 21:26:04,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:26:04,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:26:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:26:04,845 INFO L87 Difference]: Start difference. First operand 11212 states and 29359 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:05,197 INFO L93 Difference]: Finished difference Result 15940 states and 38660 transitions. [2022-03-15 21:26:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:26:05,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:26:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:05,226 INFO L225 Difference]: With dead ends: 15940 [2022-03-15 21:26:05,226 INFO L226 Difference]: Without dead ends: 15936 [2022-03-15 21:26:05,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1321, Invalid=2219, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:26:05,227 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 156 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:05,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 1 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15936 states. [2022-03-15 21:26:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15936 to 11211. [2022-03-15 21:26:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11211 states, 11210 states have (on average 2.6151650312221233) internal successors, (29316), 11210 states have internal predecessors, (29316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11211 states to 11211 states and 29316 transitions. [2022-03-15 21:26:05,425 INFO L78 Accepts]: Start accepts. Automaton has 11211 states and 29316 transitions. Word has length 33 [2022-03-15 21:26:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:05,425 INFO L470 AbstractCegarLoop]: Abstraction has 11211 states and 29316 transitions. [2022-03-15 21:26:05,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 11211 states and 29316 transitions. [2022-03-15 21:26:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:05,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:05,437 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:05,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:05,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-03-15 21:26:05,651 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1408491175, now seen corresponding path program 419 times [2022-03-15 21:26:05,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:05,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247922734] [2022-03-15 21:26:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 116 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:05,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:05,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247922734] [2022-03-15 21:26:05,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247922734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:05,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242446516] [2022-03-15 21:26:05,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:26:05,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:05,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:05,718 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:05,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-03-15 21:26:05,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-15 21:26:05,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 116 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:05,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 116 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:06,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242446516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:06,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:06,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:26:06,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1203696668] [2022-03-15 21:26:06,017 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:06,019 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:06,027 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:26:06,027 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:06,064 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6114684#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:06,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:26:06,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:26:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:26:06,064 INFO L87 Difference]: Start difference. First operand 11211 states and 29316 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:06,347 INFO L93 Difference]: Finished difference Result 18309 states and 43394 transitions. [2022-03-15 21:26:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:26:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:26:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:06,381 INFO L225 Difference]: With dead ends: 18309 [2022-03-15 21:26:06,381 INFO L226 Difference]: Without dead ends: 18305 [2022-03-15 21:26:06,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1182, Invalid=2124, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:26:06,381 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 168 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:06,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2022-03-15 21:26:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 11224. [2022-03-15 21:26:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11224 states, 11223 states have (on average 2.6155216965160832) internal successors, (29354), 11223 states have internal predecessors, (29354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11224 states to 11224 states and 29354 transitions. [2022-03-15 21:26:06,656 INFO L78 Accepts]: Start accepts. Automaton has 11224 states and 29354 transitions. Word has length 33 [2022-03-15 21:26:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:06,656 INFO L470 AbstractCegarLoop]: Abstraction has 11224 states and 29354 transitions. [2022-03-15 21:26:06,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 11224 states and 29354 transitions. [2022-03-15 21:26:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:06,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:06,667 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:06,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:06,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-03-15 21:26:06,870 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:06,870 INFO L85 PathProgramCache]: Analyzing trace with hash 553184521, now seen corresponding path program 420 times [2022-03-15 21:26:06,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:06,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605198855] [2022-03-15 21:26:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:06,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 111 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:06,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:06,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605198855] [2022-03-15 21:26:06,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605198855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:06,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033632553] [2022-03-15 21:26:06,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:26:06,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:06,971 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:06,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-03-15 21:26:07,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-15 21:26:07,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:07,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:07,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 111 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:07,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 111 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:07,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033632553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:07,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:07,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 22] total 35 [2022-03-15 21:26:07,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [210832951] [2022-03-15 21:26:07,326 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:07,328 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:07,336 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:26:07,337 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:07,392 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [6155712#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6155713#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:26:07,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:26:07,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:26:07,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=867, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:26:07,393 INFO L87 Difference]: Start difference. First operand 11224 states and 29354 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:26:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:07,745 INFO L93 Difference]: Finished difference Result 18688 states and 44086 transitions. [2022-03-15 21:26:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:26:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:26:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:07,778 INFO L225 Difference]: With dead ends: 18688 [2022-03-15 21:26:07,779 INFO L226 Difference]: Without dead ends: 18682 [2022-03-15 21:26:07,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1376, Invalid=2784, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:26:07,779 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 186 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:07,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:07,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18682 states. [2022-03-15 21:26:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18682 to 11252. [2022-03-15 21:26:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11252 states, 11251 states have (on average 2.616478535241312) internal successors, (29438), 11251 states have internal predecessors, (29438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11252 states to 11252 states and 29438 transitions. [2022-03-15 21:26:08,003 INFO L78 Accepts]: Start accepts. Automaton has 11252 states and 29438 transitions. Word has length 33 [2022-03-15 21:26:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:08,003 INFO L470 AbstractCegarLoop]: Abstraction has 11252 states and 29438 transitions. [2022-03-15 21:26:08,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:26:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 11252 states and 29438 transitions. [2022-03-15 21:26:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:08,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:08,015 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:08,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:08,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-03-15 21:26:08,219 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:08,220 INFO L85 PathProgramCache]: Analyzing trace with hash -191517977, now seen corresponding path program 421 times [2022-03-15 21:26:08,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:08,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039670858] [2022-03-15 21:26:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:08,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:08,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:08,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039670858] [2022-03-15 21:26:08,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039670858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:08,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830274755] [2022-03-15 21:26:08,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:26:08,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:08,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:08,326 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:08,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-03-15 21:26:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:08,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:08,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830274755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:08,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:08,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:26:08,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [192452287] [2022-03-15 21:26:08,610 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:08,612 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:08,621 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:26:08,621 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:08,698 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [6197191#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6197190#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6197189#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:08,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:26:08,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:08,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:26:08,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:26:08,699 INFO L87 Difference]: Start difference. First operand 11252 states and 29438 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:26:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:09,190 INFO L93 Difference]: Finished difference Result 18154 states and 42798 transitions. [2022-03-15 21:26:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:26:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:26:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:09,222 INFO L225 Difference]: With dead ends: 18154 [2022-03-15 21:26:09,223 INFO L226 Difference]: Without dead ends: 18146 [2022-03-15 21:26:09,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1870, Invalid=4292, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:26:09,224 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 206 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:09,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18146 states. [2022-03-15 21:26:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18146 to 11248. [2022-03-15 21:26:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11248 states, 11247 states have (on average 2.616342135680626) internal successors, (29426), 11247 states have internal predecessors, (29426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11248 states to 11248 states and 29426 transitions. [2022-03-15 21:26:09,481 INFO L78 Accepts]: Start accepts. Automaton has 11248 states and 29426 transitions. Word has length 33 [2022-03-15 21:26:09,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:09,482 INFO L470 AbstractCegarLoop]: Abstraction has 11248 states and 29426 transitions. [2022-03-15 21:26:09,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:26:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11248 states and 29426 transitions. [2022-03-15 21:26:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:09,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:09,494 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:09,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:09,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-03-15 21:26:09,704 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1802458935, now seen corresponding path program 422 times [2022-03-15 21:26:09,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:09,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700901428] [2022-03-15 21:26:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:09,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:09,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700901428] [2022-03-15 21:26:09,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700901428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:09,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214329497] [2022-03-15 21:26:09,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:26:09,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:09,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:09,780 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:09,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-03-15 21:26:09,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:26:09,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:09,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:09,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:09,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:10,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214329497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:10,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:10,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 36 [2022-03-15 21:26:10,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [677553882] [2022-03-15 21:26:10,055 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:10,057 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:10,066 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:26:10,066 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:10,162 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [6238149#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6238150#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6238151#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6238152#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:26:10,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:26:10,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:10,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:26:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:26:10,163 INFO L87 Difference]: Start difference. First operand 11248 states and 29426 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:10,684 INFO L93 Difference]: Finished difference Result 16724 states and 39642 transitions. [2022-03-15 21:26:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:26:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 33 [2022-03-15 21:26:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:10,714 INFO L225 Difference]: With dead ends: 16724 [2022-03-15 21:26:10,714 INFO L226 Difference]: Without dead ends: 16714 [2022-03-15 21:26:10,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1896, Invalid=4424, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:26:10,715 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 229 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:10,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 1 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:10,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16714 states. [2022-03-15 21:26:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16714 to 11181. [2022-03-15 21:26:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11181 states, 11180 states have (on average 2.61350626118068) internal successors, (29219), 11180 states have internal predecessors, (29219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 29219 transitions. [2022-03-15 21:26:10,938 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 29219 transitions. Word has length 33 [2022-03-15 21:26:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:10,938 INFO L470 AbstractCegarLoop]: Abstraction has 11181 states and 29219 transitions. [2022-03-15 21:26:10,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:10,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 29219 transitions. [2022-03-15 21:26:10,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:10,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:10,951 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:10,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:11,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2022-03-15 21:26:11,167 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -202021081, now seen corresponding path program 423 times [2022-03-15 21:26:11,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:11,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589909446] [2022-03-15 21:26:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:11,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:11,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589909446] [2022-03-15 21:26:11,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589909446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:11,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943143134] [2022-03-15 21:26:11,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:26:11,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:11,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:11,251 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:11,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-03-15 21:26:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-15 21:26:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:11,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:11,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:11,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943143134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:11,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:11,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:26:11,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [560113812] [2022-03-15 21:26:11,535 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:11,537 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:11,546 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 57 transitions. [2022-03-15 21:26:11,547 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:11,705 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [6277550#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 6277548#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6277549#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6277547#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6277551#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:26:11,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:26:11,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:26:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:26:11,706 INFO L87 Difference]: Start difference. First operand 11181 states and 29219 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:12,417 INFO L93 Difference]: Finished difference Result 14451 states and 34793 transitions. [2022-03-15 21:26:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 21:26:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 33 [2022-03-15 21:26:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:12,441 INFO L225 Difference]: With dead ends: 14451 [2022-03-15 21:26:12,441 INFO L226 Difference]: Without dead ends: 14451 [2022-03-15 21:26:12,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2611, Invalid=6701, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 21:26:12,442 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 256 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:12,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14451 states. [2022-03-15 21:26:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14451 to 11112. [2022-03-15 21:26:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11112 states, 11111 states have (on average 2.6009360093600935) internal successors, (28899), 11111 states have internal predecessors, (28899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11112 states to 11112 states and 28899 transitions. [2022-03-15 21:26:12,649 INFO L78 Accepts]: Start accepts. Automaton has 11112 states and 28899 transitions. Word has length 33 [2022-03-15 21:26:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:12,649 INFO L470 AbstractCegarLoop]: Abstraction has 11112 states and 28899 transitions. [2022-03-15 21:26:12,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 11112 states and 28899 transitions. [2022-03-15 21:26:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:12,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:12,660 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:12,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:12,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:12,877 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2128055159, now seen corresponding path program 424 times [2022-03-15 21:26:12,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:12,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078845132] [2022-03-15 21:26:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:12,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:12,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:12,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078845132] [2022-03-15 21:26:12,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078845132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:12,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062268672] [2022-03-15 21:26:12,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:26:12,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:12,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:12,975 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:12,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-03-15 21:26:13,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:26:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:13,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:13,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062268672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:13,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:13,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 24] total 37 [2022-03-15 21:26:13,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1365698558] [2022-03-15 21:26:13,251 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:13,253 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:13,262 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 61 transitions. [2022-03-15 21:26:13,262 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:13,412 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [6314567#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6314566#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6314568#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 6314570#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 6314569#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 6314565#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:13,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:26:13,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:13,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:26:13,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:26:13,413 INFO L87 Difference]: Start difference. First operand 11112 states and 28899 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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 21:26:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:14,254 INFO L93 Difference]: Finished difference Result 15185 states and 36599 transitions. [2022-03-15 21:26:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 21:26:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 33 [2022-03-15 21:26:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:14,284 INFO L225 Difference]: With dead ends: 15185 [2022-03-15 21:26:14,284 INFO L226 Difference]: Without dead ends: 15185 [2022-03-15 21:26:14,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2780, Invalid=7120, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 21:26:14,285 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 284 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:14,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 1 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15185 states. [2022-03-15 21:26:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15185 to 11148. [2022-03-15 21:26:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11148 states, 11147 states have (on average 2.6021351036153226) internal successors, (29006), 11147 states have internal predecessors, (29006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 29006 transitions. [2022-03-15 21:26:14,528 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 29006 transitions. Word has length 33 [2022-03-15 21:26:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:14,528 INFO L470 AbstractCegarLoop]: Abstraction has 11148 states and 29006 transitions. [2022-03-15 21:26:14,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 21:26:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 29006 transitions. [2022-03-15 21:26:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:14,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:14,539 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:14,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:14,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:14,755 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:14,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:14,755 INFO L85 PathProgramCache]: Analyzing trace with hash -277497753, now seen corresponding path program 425 times [2022-03-15 21:26:14,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:14,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314035886] [2022-03-15 21:26:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:14,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:26:14,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:14,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314035886] [2022-03-15 21:26:14,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314035886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:14,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944892411] [2022-03-15 21:26:14,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:26:14,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:14,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:14,813 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:14,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-03-15 21:26:14,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:26:14,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:14,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:26:14,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:15,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944892411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:15,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:15,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 22] total 34 [2022-03-15 21:26:15,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1346143944] [2022-03-15 21:26:15,065 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:15,067 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:15,075 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:26:15,075 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:15,098 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [6352392#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 6352391#(< i2 (* 2 N))] [2022-03-15 21:26:15,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:26:15,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:26:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=783, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:26:15,098 INFO L87 Difference]: Start difference. First operand 11148 states and 29006 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:15,371 INFO L93 Difference]: Finished difference Result 15174 states and 36762 transitions. [2022-03-15 21:26:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:26:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:26:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:15,402 INFO L225 Difference]: With dead ends: 15174 [2022-03-15 21:26:15,402 INFO L226 Difference]: Without dead ends: 15170 [2022-03-15 21:26:15,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:26:15,403 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 158 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:15,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15170 states. [2022-03-15 21:26:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15170 to 11239. [2022-03-15 21:26:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11239 states, 11238 states have (on average 2.607937355401317) internal successors, (29308), 11238 states have internal predecessors, (29308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11239 states to 11239 states and 29308 transitions. [2022-03-15 21:26:15,628 INFO L78 Accepts]: Start accepts. Automaton has 11239 states and 29308 transitions. Word has length 33 [2022-03-15 21:26:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:15,628 INFO L470 AbstractCegarLoop]: Abstraction has 11239 states and 29308 transitions. [2022-03-15 21:26:15,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 11239 states and 29308 transitions. [2022-03-15 21:26:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:15,640 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:15,640 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:15,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:15,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2022-03-15 21:26:15,855 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash -603968445, now seen corresponding path program 426 times [2022-03-15 21:26:15,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:15,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708196943] [2022-03-15 21:26:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:15,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 118 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:15,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:15,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708196943] [2022-03-15 21:26:15,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708196943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:15,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506052326] [2022-03-15 21:26:15,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:26:15,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:15,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:15,921 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:15,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-03-15 21:26:15,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 21:26:15,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 118 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:15,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 118 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:16,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506052326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:16,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:16,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:26:16,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [526793134] [2022-03-15 21:26:16,175 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:16,178 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:16,185 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:26:16,185 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:16,195 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6390320#(< i2 (* 2 N))] [2022-03-15 21:26:16,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:26:16,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:16,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:26:16,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:26:16,196 INFO L87 Difference]: Start difference. First operand 11239 states and 29308 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:16,483 INFO L93 Difference]: Finished difference Result 15935 states and 38571 transitions. [2022-03-15 21:26:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:26:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:26:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:16,513 INFO L225 Difference]: With dead ends: 15935 [2022-03-15 21:26:16,514 INFO L226 Difference]: Without dead ends: 15931 [2022-03-15 21:26:16,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1388, Invalid=2394, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:26:16,514 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 142 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:16,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15931 states. [2022-03-15 21:26:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15931 to 11238. [2022-03-15 21:26:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.604876746462579) internal successors, (29271), 11237 states have internal predecessors, (29271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 29271 transitions. [2022-03-15 21:26:16,782 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 29271 transitions. Word has length 33 [2022-03-15 21:26:16,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:16,782 INFO L470 AbstractCegarLoop]: Abstraction has 11238 states and 29271 transitions. [2022-03-15 21:26:16,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 29271 transitions. [2022-03-15 21:26:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:16,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:16,794 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:16,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:17,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:17,005 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:17,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1102669785, now seen corresponding path program 427 times [2022-03-15 21:26:17,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:17,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239433482] [2022-03-15 21:26:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 115 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:17,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:17,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239433482] [2022-03-15 21:26:17,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239433482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:17,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607522579] [2022-03-15 21:26:17,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:26:17,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:17,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:17,067 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:17,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-03-15 21:26:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:17,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 115 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:17,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 115 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:17,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607522579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:17,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:17,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:26:17,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [646015982] [2022-03-15 21:26:17,360 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:17,362 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:17,370 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:26:17,370 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:17,415 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6429012#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:17,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:26:17,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:26:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:26:17,416 INFO L87 Difference]: Start difference. First operand 11238 states and 29271 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:17,747 INFO L93 Difference]: Finished difference Result 18265 states and 43285 transitions. [2022-03-15 21:26:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:26:17,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:26:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:17,778 INFO L225 Difference]: With dead ends: 18265 [2022-03-15 21:26:17,778 INFO L226 Difference]: Without dead ends: 18261 [2022-03-15 21:26:17,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1212, Invalid=2210, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:26:17,779 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 148 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:17,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18261 states. [2022-03-15 21:26:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18261 to 11245. [2022-03-15 21:26:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11245 states, 11244 states have (on average 2.6051227321237995) internal successors, (29292), 11244 states have internal predecessors, (29292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11245 states to 11245 states and 29292 transitions. [2022-03-15 21:26:17,995 INFO L78 Accepts]: Start accepts. Automaton has 11245 states and 29292 transitions. Word has length 33 [2022-03-15 21:26:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:17,995 INFO L470 AbstractCegarLoop]: Abstraction has 11245 states and 29292 transitions. [2022-03-15 21:26:17,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:17,995 INFO L276 IsEmpty]: Start isEmpty. Operand 11245 states and 29292 transitions. [2022-03-15 21:26:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:18,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:18,007 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:18,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:18,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2022-03-15 21:26:18,223 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:18,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:18,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1957976439, now seen corresponding path program 428 times [2022-03-15 21:26:18,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:18,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295418527] [2022-03-15 21:26:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:18,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 111 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:18,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:18,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295418527] [2022-03-15 21:26:18,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295418527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:18,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432584830] [2022-03-15 21:26:18,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:26:18,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:18,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:18,311 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:18,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-03-15 21:26:18,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:26:18,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:18,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 111 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:18,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 111 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:18,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432584830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:18,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:18,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 23] total 36 [2022-03-15 21:26:18,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2033791761] [2022-03-15 21:26:18,653 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:18,656 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:18,666 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:26:18,667 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:18,740 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [6470041#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6470042#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:26:18,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:26:18,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:26:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=911, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:26:18,740 INFO L87 Difference]: Start difference. First operand 11245 states and 29292 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:26:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:19,219 INFO L93 Difference]: Finished difference Result 18987 states and 44713 transitions. [2022-03-15 21:26:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:26:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:26:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:19,254 INFO L225 Difference]: With dead ends: 18987 [2022-03-15 21:26:19,254 INFO L226 Difference]: Without dead ends: 18981 [2022-03-15 21:26:19,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1496, Invalid=3060, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:26:19,255 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 194 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:19,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18981 states. [2022-03-15 21:26:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18981 to 11268. [2022-03-15 21:26:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11268 states, 11267 states have (on average 2.6059288186740037) internal successors, (29361), 11267 states have internal predecessors, (29361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11268 states to 11268 states and 29361 transitions. [2022-03-15 21:26:19,529 INFO L78 Accepts]: Start accepts. Automaton has 11268 states and 29361 transitions. Word has length 33 [2022-03-15 21:26:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:19,529 INFO L470 AbstractCegarLoop]: Abstraction has 11268 states and 29361 transitions. [2022-03-15 21:26:19,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:26:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11268 states and 29361 transitions. [2022-03-15 21:26:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:19,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:19,541 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:19,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Ended with exit code 0 [2022-03-15 21:26:19,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:19,755 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1592288359, now seen corresponding path program 429 times [2022-03-15 21:26:19,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:19,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773852763] [2022-03-15 21:26:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:19,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:19,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:19,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773852763] [2022-03-15 21:26:19,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773852763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:19,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482457763] [2022-03-15 21:26:19,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:26:19,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:19,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:19,871 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:19,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-03-15 21:26:19,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-15 21:26:19,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:19,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:19,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:19,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:20,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482457763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:20,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:20,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:26:20,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [966650937] [2022-03-15 21:26:20,274 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:20,276 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:20,284 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:26:20,284 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:20,387 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [6511855#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6511854#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6511853#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:20,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:26:20,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:26:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:26:20,388 INFO L87 Difference]: Start difference. First operand 11268 states and 29361 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:26:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:21,028 INFO L93 Difference]: Finished difference Result 18945 states and 44460 transitions. [2022-03-15 21:26:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:26:21,028 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:26:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:21,074 INFO L225 Difference]: With dead ends: 18945 [2022-03-15 21:26:21,074 INFO L226 Difference]: Without dead ends: 18937 [2022-03-15 21:26:21,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1992, Invalid=4650, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 21:26:21,075 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 200 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:21,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18937 states. [2022-03-15 21:26:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18937 to 11296. [2022-03-15 21:26:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11295 states have (on average 2.6068171757414786) internal successors, (29444), 11295 states have internal predecessors, (29444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 29444 transitions. [2022-03-15 21:26:21,331 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 29444 transitions. Word has length 33 [2022-03-15 21:26:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:21,331 INFO L470 AbstractCegarLoop]: Abstraction has 11296 states and 29444 transitions. [2022-03-15 21:26:21,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:26:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 29444 transitions. [2022-03-15 21:26:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:21,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:21,343 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:21,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-03-15 21:26:21,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-03-15 21:26:21,559 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:21,559 INFO L85 PathProgramCache]: Analyzing trace with hash -18652599, now seen corresponding path program 430 times [2022-03-15 21:26:21,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:21,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410924941] [2022-03-15 21:26:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:21,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:21,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410924941] [2022-03-15 21:26:21,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410924941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:21,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430064153] [2022-03-15 21:26:21,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:26:21,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:21,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:21,673 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:21,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-03-15 21:26:21,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:26:21,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:21,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:21,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:21,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:22,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430064153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:22,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:22,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 37 [2022-03-15 21:26:22,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [226071166] [2022-03-15 21:26:22,075 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:22,077 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:22,086 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:26:22,086 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:22,242 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [6553707#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6553710#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 6553709#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6553708#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:26:22,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:26:22,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:22,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:26:22,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:26:22,243 INFO L87 Difference]: Start difference. First operand 11296 states and 29444 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:22,998 INFO L93 Difference]: Finished difference Result 18107 states and 42534 transitions. [2022-03-15 21:26:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:26:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 33 [2022-03-15 21:26:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:23,033 INFO L225 Difference]: With dead ends: 18107 [2022-03-15 21:26:23,033 INFO L226 Difference]: Without dead ends: 18097 [2022-03-15 21:26:23,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2122, Invalid=5018, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:26:23,034 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 257 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:23,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18097 states. [2022-03-15 21:26:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18097 to 11288. [2022-03-15 21:26:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11288 states, 11287 states have (on average 2.6067156906175244) internal successors, (29422), 11287 states have internal predecessors, (29422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11288 states to 11288 states and 29422 transitions. [2022-03-15 21:26:23,267 INFO L78 Accepts]: Start accepts. Automaton has 11288 states and 29422 transitions. Word has length 33 [2022-03-15 21:26:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:23,267 INFO L470 AbstractCegarLoop]: Abstraction has 11288 states and 29422 transitions. [2022-03-15 21:26:23,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 11288 states and 29422 transitions. [2022-03-15 21:26:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:23,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:23,279 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:23,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:23,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-03-15 21:26:23,482 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1581785255, now seen corresponding path program 431 times [2022-03-15 21:26:23,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:23,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491082622] [2022-03-15 21:26:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:23,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:23,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491082622] [2022-03-15 21:26:23,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491082622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:23,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876893861] [2022-03-15 21:26:23,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:26:23,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:23,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:23,616 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:23,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-03-15 21:26:23,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-15 21:26:23,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:23,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:23,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:23,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:24,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876893861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:24,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:24,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:26:24,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [564180669] [2022-03-15 21:26:24,019 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:24,021 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:24,030 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 57 transitions. [2022-03-15 21:26:24,030 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:24,218 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [6594713#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 6594711#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6594710#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6594712#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6594714#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:26:24,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:26:24,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:26:24,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:26:24,219 INFO L87 Difference]: Start difference. First operand 11288 states and 29422 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:25,383 INFO L93 Difference]: Finished difference Result 16485 states and 39037 transitions. [2022-03-15 21:26:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 21:26:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 33 [2022-03-15 21:26:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:25,413 INFO L225 Difference]: With dead ends: 16485 [2022-03-15 21:26:25,413 INFO L226 Difference]: Without dead ends: 16473 [2022-03-15 21:26:25,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3679 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2926, Invalid=7580, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 21:26:25,414 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 269 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:25,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 1 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:26:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2022-03-15 21:26:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 11196. [2022-03-15 21:26:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11196 states, 11195 states have (on average 2.606163465832961) internal successors, (29176), 11195 states have internal predecessors, (29176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11196 states to 11196 states and 29176 transitions. [2022-03-15 21:26:25,625 INFO L78 Accepts]: Start accepts. Automaton has 11196 states and 29176 transitions. Word has length 33 [2022-03-15 21:26:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:25,625 INFO L470 AbstractCegarLoop]: Abstraction has 11196 states and 29176 transitions. [2022-03-15 21:26:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 11196 states and 29176 transitions. [2022-03-15 21:26:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:25,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:25,670 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:25,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:25,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-03-15 21:26:25,872 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash -344248823, now seen corresponding path program 432 times [2022-03-15 21:26:25,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:25,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747707313] [2022-03-15 21:26:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:25,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:26,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:26,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747707313] [2022-03-15 21:26:26,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747707313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:26,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222463562] [2022-03-15 21:26:26,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:26:26,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:26,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:26,017 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:26,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-03-15 21:26:26,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 21:26:26,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:26,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:26,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:26,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:26,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222463562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:26,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:26,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 25] total 38 [2022-03-15 21:26:26,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1658226044] [2022-03-15 21:26:26,420 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:26,422 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:26,431 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 61 transitions. [2022-03-15 21:26:26,431 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:26,658 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [6633945#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6633943#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6633947#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 6633944#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6633946#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 6633948#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:26:26,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:26:26,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:26,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:26:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:26:26,659 INFO L87 Difference]: Start difference. First operand 11196 states and 29176 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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 21:26:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:27,559 INFO L93 Difference]: Finished difference Result 14167 states and 34158 transitions. [2022-03-15 21:26:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 21:26:27,559 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 33 [2022-03-15 21:26:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:27,585 INFO L225 Difference]: With dead ends: 14167 [2022-03-15 21:26:27,585 INFO L226 Difference]: Without dead ends: 14167 [2022-03-15 21:26:27,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2769, Invalid=7331, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 21:26:27,587 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 254 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:27,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14167 states. [2022-03-15 21:26:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14167 to 11094. [2022-03-15 21:26:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.5946092130172183) internal successors, (28782), 11093 states have internal predecessors, (28782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28782 transitions. [2022-03-15 21:26:27,793 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28782 transitions. Word has length 33 [2022-03-15 21:26:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:27,794 INFO L470 AbstractCegarLoop]: Abstraction has 11094 states and 28782 transitions. [2022-03-15 21:26:27,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 21:26:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28782 transitions. [2022-03-15 21:26:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:27,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:27,807 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:27,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:28,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2022-03-15 21:26:28,021 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:28,021 INFO L85 PathProgramCache]: Analyzing trace with hash 78236903, now seen corresponding path program 433 times [2022-03-15 21:26:28,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:28,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959793985] [2022-03-15 21:26:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:28,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:28,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:28,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959793985] [2022-03-15 21:26:28,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959793985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:28,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872330036] [2022-03-15 21:26:28,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:26:28,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:28,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:28,124 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:28,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-03-15 21:26:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:28,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:28,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872330036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:28,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:28,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 25] total 38 [2022-03-15 21:26:28,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1182878210] [2022-03-15 21:26:28,391 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:28,394 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:28,403 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 65 transitions. [2022-03-15 21:26:28,404 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:28,574 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [6670653#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 6670649#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6670647#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6670650#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 6670648#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6670651#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 6670652#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:26:28,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:26:28,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:26:28,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:26:28,575 INFO L87 Difference]: Start difference. First operand 11094 states and 28782 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:26:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:29,819 INFO L93 Difference]: Finished difference Result 14657 states and 35472 transitions. [2022-03-15 21:26:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 21:26:29,819 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 33 [2022-03-15 21:26:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:29,847 INFO L225 Difference]: With dead ends: 14657 [2022-03-15 21:26:29,847 INFO L226 Difference]: Without dead ends: 14657 [2022-03-15 21:26:29,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5566 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4298, Invalid=11704, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 21:26:29,848 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 314 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:29,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14657 states. [2022-03-15 21:26:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14657 to 11136. [2022-03-15 21:26:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11136 states, 11135 states have (on average 2.5960484957341716) internal successors, (28907), 11135 states have internal predecessors, (28907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11136 states to 11136 states and 28907 transitions. [2022-03-15 21:26:30,048 INFO L78 Accepts]: Start accepts. Automaton has 11136 states and 28907 transitions. Word has length 33 [2022-03-15 21:26:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:30,048 INFO L470 AbstractCegarLoop]: Abstraction has 11136 states and 28907 transitions. [2022-03-15 21:26:30,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:26:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 11136 states and 28907 transitions. [2022-03-15 21:26:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:30,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:30,060 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:30,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Ended with exit code 0 [2022-03-15 21:26:30,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:30,276 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1199034249, now seen corresponding path program 434 times [2022-03-15 21:26:30,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:30,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164905700] [2022-03-15 21:26:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:26:30,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:30,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164905700] [2022-03-15 21:26:30,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164905700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:30,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952018004] [2022-03-15 21:26:30,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:26:30,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:30,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:30,368 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:30,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-03-15 21:26:30,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:26:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:30,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:26:30,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:30,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952018004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:30,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:30,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 33 [2022-03-15 21:26:30,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [126080387] [2022-03-15 21:26:30,728 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:30,730 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:30,738 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:26:30,738 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:30,773 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [6707972#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 6707971#(< i2 (* 2 N))] [2022-03-15 21:26:30,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:26:30,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:30,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:26:30,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=740, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:26:30,774 INFO L87 Difference]: Start difference. First operand 11136 states and 28907 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:31,141 INFO L93 Difference]: Finished difference Result 15068 states and 36487 transitions. [2022-03-15 21:26:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:26:31,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:26:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:31,169 INFO L225 Difference]: With dead ends: 15068 [2022-03-15 21:26:31,170 INFO L226 Difference]: Without dead ends: 15064 [2022-03-15 21:26:31,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1345, Invalid=2437, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:26:31,170 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 164 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:31,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15064 states. [2022-03-15 21:26:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15064 to 11226. [2022-03-15 21:26:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11226 states, 11225 states have (on average 2.601336302895323) internal successors, (29200), 11225 states have internal predecessors, (29200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11226 states to 11226 states and 29200 transitions. [2022-03-15 21:26:31,378 INFO L78 Accepts]: Start accepts. Automaton has 11226 states and 29200 transitions. Word has length 33 [2022-03-15 21:26:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:31,378 INFO L470 AbstractCegarLoop]: Abstraction has 11226 states and 29200 transitions. [2022-03-15 21:26:31,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11226 states and 29200 transitions. [2022-03-15 21:26:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:31,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:31,391 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:31,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:31,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-03-15 21:26:31,604 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1140546877, now seen corresponding path program 435 times [2022-03-15 21:26:31,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:31,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751878292] [2022-03-15 21:26:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:31,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:31,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:31,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751878292] [2022-03-15 21:26:31,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751878292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:31,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128040447] [2022-03-15 21:26:31,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:26:31,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:31,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:31,682 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:31,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-03-15 21:26:31,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 21:26:31,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:31,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 114 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:32,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128040447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:32,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:32,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:26:32,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1343385341] [2022-03-15 21:26:32,038 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:32,040 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:32,048 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:26:32,048 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:32,061 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6745772#(< i2 (* 2 N))] [2022-03-15 21:26:32,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:26:32,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:32,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:26:32,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:26:32,062 INFO L87 Difference]: Start difference. First operand 11226 states and 29200 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:32,462 INFO L93 Difference]: Finished difference Result 15730 states and 38090 transitions. [2022-03-15 21:26:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:26:32,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:26:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:32,536 INFO L225 Difference]: With dead ends: 15730 [2022-03-15 21:26:32,537 INFO L226 Difference]: Without dead ends: 15726 [2022-03-15 21:26:32,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1453, Invalid=2579, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:26:32,537 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 132 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:32,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:32,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15726 states. [2022-03-15 21:26:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15726 to 11224. [2022-03-15 21:26:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11224 states, 11223 states have (on average 2.598681279515281) internal successors, (29165), 11223 states have internal predecessors, (29165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11224 states to 11224 states and 29165 transitions. [2022-03-15 21:26:32,722 INFO L78 Accepts]: Start accepts. Automaton has 11224 states and 29165 transitions. Word has length 33 [2022-03-15 21:26:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:32,722 INFO L470 AbstractCegarLoop]: Abstraction has 11224 states and 29165 transitions. [2022-03-15 21:26:32,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 11224 states and 29165 transitions. [2022-03-15 21:26:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:32,735 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:32,735 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:32,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:32,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2022-03-15 21:26:32,947 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1639248217, now seen corresponding path program 436 times [2022-03-15 21:26:32,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:32,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872082464] [2022-03-15 21:26:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:32,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:33,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:33,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872082464] [2022-03-15 21:26:33,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872082464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:33,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663134341] [2022-03-15 21:26:33,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:26:33,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:33,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:33,049 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:33,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-03-15 21:26:33,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:26:33,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:33,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:33,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 112 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:33,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663134341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:33,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:33,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:26:33,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1077629390] [2022-03-15 21:26:33,451 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:33,453 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:33,461 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:26:33,461 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:33,500 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6784235#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:33,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:26:33,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:26:33,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:26:33,501 INFO L87 Difference]: Start difference. First operand 11224 states and 29165 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:33,777 INFO L93 Difference]: Finished difference Result 17884 states and 42489 transitions. [2022-03-15 21:26:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:26:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:26:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:33,810 INFO L225 Difference]: With dead ends: 17884 [2022-03-15 21:26:33,810 INFO L226 Difference]: Without dead ends: 17880 [2022-03-15 21:26:33,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1243, Invalid=2297, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:26:33,811 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 180 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:33,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17880 states. [2022-03-15 21:26:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17880 to 11230. [2022-03-15 21:26:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11230 states, 11229 states have (on average 2.5988957164484816) internal successors, (29183), 11229 states have internal predecessors, (29183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11230 states to 11230 states and 29183 transitions. [2022-03-15 21:26:34,035 INFO L78 Accepts]: Start accepts. Automaton has 11230 states and 29183 transitions. Word has length 33 [2022-03-15 21:26:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:34,035 INFO L470 AbstractCegarLoop]: Abstraction has 11230 states and 29183 transitions. [2022-03-15 21:26:34,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 11230 states and 29183 transitions. [2022-03-15 21:26:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:34,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:34,046 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:34,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:34,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:34,258 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:34,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:34,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1800412425, now seen corresponding path program 437 times [2022-03-15 21:26:34,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:34,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263630751] [2022-03-15 21:26:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:34,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 109 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:34,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:34,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263630751] [2022-03-15 21:26:34,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263630751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:34,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881136795] [2022-03-15 21:26:34,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:26:34,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:34,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:34,360 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:34,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-03-15 21:26:34,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:26:34,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:34,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 109 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:34,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 109 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:34,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881136795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:34,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:34,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 22] total 35 [2022-03-15 21:26:34,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1913805605] [2022-03-15 21:26:34,743 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:34,746 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:34,755 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:26:34,756 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:34,840 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [6824854#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6824855#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:26:34,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:26:34,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:26:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=867, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:26:34,841 INFO L87 Difference]: Start difference. First operand 11230 states and 29183 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:26:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:35,317 INFO L93 Difference]: Finished difference Result 18815 states and 44369 transitions. [2022-03-15 21:26:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:26:35,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:26:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:35,345 INFO L225 Difference]: With dead ends: 18815 [2022-03-15 21:26:35,345 INFO L226 Difference]: Without dead ends: 18809 [2022-03-15 21:26:35,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1515, Invalid=3177, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:26:35,345 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 212 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:35,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18809 states. [2022-03-15 21:26:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18809 to 11248. [2022-03-15 21:26:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11248 states, 11247 states have (on average 2.5995376544856406) internal successors, (29237), 11247 states have internal predecessors, (29237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11248 states to 11248 states and 29237 transitions. [2022-03-15 21:26:35,567 INFO L78 Accepts]: Start accepts. Automaton has 11248 states and 29237 transitions. Word has length 33 [2022-03-15 21:26:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:35,567 INFO L470 AbstractCegarLoop]: Abstraction has 11248 states and 29237 transitions. [2022-03-15 21:26:35,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:26:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 11248 states and 29237 transitions. [2022-03-15 21:26:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:35,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:35,579 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:35,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:35,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:35,787 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1055709927, now seen corresponding path program 438 times [2022-03-15 21:26:35,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:35,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251375971] [2022-03-15 21:26:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:35,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:35,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:35,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251375971] [2022-03-15 21:26:35,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251375971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:35,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869125451] [2022-03-15 21:26:35,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:26:35,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:35,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:35,877 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:35,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-03-15 21:26:35,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:26:35,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:35,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:35,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 106 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:36,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869125451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:36,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:36,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:26:36,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1697955624] [2022-03-15 21:26:36,172 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:36,174 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:36,182 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:26:36,182 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:36,256 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [6866460#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6866458#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6866459#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:26:36,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:26:36,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:26:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:26:36,257 INFO L87 Difference]: Start difference. First operand 11248 states and 29237 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:26:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:36,895 INFO L93 Difference]: Finished difference Result 19098 states and 44811 transitions. [2022-03-15 21:26:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:26:36,895 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:26:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:36,930 INFO L225 Difference]: With dead ends: 19098 [2022-03-15 21:26:36,930 INFO L226 Difference]: Without dead ends: 19090 [2022-03-15 21:26:36,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2104, Invalid=5036, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:26:36,932 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 204 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:36,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19090 states. [2022-03-15 21:26:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19090 to 11270. [2022-03-15 21:26:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11270 states, 11269 states have (on average 2.600230721448221) internal successors, (29302), 11269 states have internal predecessors, (29302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 29302 transitions. [2022-03-15 21:26:37,157 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 29302 transitions. Word has length 33 [2022-03-15 21:26:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:37,158 INFO L470 AbstractCegarLoop]: Abstraction has 11270 states and 29302 transitions. [2022-03-15 21:26:37,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:26:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 29302 transitions. [2022-03-15 21:26:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:37,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:37,169 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:37,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:37,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:37,378 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash -555231031, now seen corresponding path program 439 times [2022-03-15 21:26:37,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:37,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724272199] [2022-03-15 21:26:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:37,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:37,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724272199] [2022-03-15 21:26:37,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724272199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:37,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477416576] [2022-03-15 21:26:37,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:26:37,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:37,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:37,509 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:37,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-03-15 21:26:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:37,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:37,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:37,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:37,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477416576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:37,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:37,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 36 [2022-03-15 21:26:37,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1590785008] [2022-03-15 21:26:37,923 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:37,926 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:37,969 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:26:37,970 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:38,127 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [6908420#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6908419#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6908418#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6908421#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:26:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:26:38,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:26:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:26:38,127 INFO L87 Difference]: Start difference. First operand 11270 states and 29302 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:38,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:38,771 INFO L93 Difference]: Finished difference Result 18736 states and 43879 transitions. [2022-03-15 21:26:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 21:26:38,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 33 [2022-03-15 21:26:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:38,805 INFO L225 Difference]: With dead ends: 18736 [2022-03-15 21:26:38,806 INFO L226 Difference]: Without dead ends: 18726 [2022-03-15 21:26:38,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2729 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2249, Invalid=5407, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 21:26:38,807 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 253 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:38,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18726 states. [2022-03-15 21:26:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18726 to 11292. [2022-03-15 21:26:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11292 states, 11291 states have (on average 2.6009210875918876) internal successors, (29367), 11291 states have internal predecessors, (29367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11292 states to 11292 states and 29367 transitions. [2022-03-15 21:26:39,037 INFO L78 Accepts]: Start accepts. Automaton has 11292 states and 29367 transitions. Word has length 33 [2022-03-15 21:26:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:39,038 INFO L470 AbstractCegarLoop]: Abstraction has 11292 states and 29367 transitions. [2022-03-15 21:26:39,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 11292 states and 29367 transitions. [2022-03-15 21:26:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:39,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:39,050 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:39,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Ended with exit code 0 [2022-03-15 21:26:39,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-03-15 21:26:39,265 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1045206823, now seen corresponding path program 440 times [2022-03-15 21:26:39,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:39,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15092893] [2022-03-15 21:26:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:39,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:39,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:39,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15092893] [2022-03-15 21:26:39,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15092893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:39,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599915478] [2022-03-15 21:26:39,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:26:39,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:39,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:39,348 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:39,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-03-15 21:26:39,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:26:39,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:39,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:39,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:39,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:39,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599915478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:39,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:39,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:26:39,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1714087965] [2022-03-15 21:26:39,674 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:39,676 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:39,684 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 57 transitions. [2022-03-15 21:26:39,685 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:39,841 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [6950069#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 6950067#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6950070#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 6950066#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6950068#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:26:39,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:26:39,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:39,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:26:39,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:26:39,842 INFO L87 Difference]: Start difference. First operand 11292 states and 29367 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:41,040 INFO L93 Difference]: Finished difference Result 17700 states and 41580 transitions. [2022-03-15 21:26:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 21:26:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 33 [2022-03-15 21:26:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:41,074 INFO L225 Difference]: With dead ends: 17700 [2022-03-15 21:26:41,074 INFO L226 Difference]: Without dead ends: 17688 [2022-03-15 21:26:41,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3117, Invalid=8225, Unknown=0, NotChecked=0, Total=11342 [2022-03-15 21:26:41,076 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 245 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:41,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:26:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17688 states. [2022-03-15 21:26:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17688 to 11270. [2022-03-15 21:26:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11270 states, 11269 states have (on average 2.6014730677078712) internal successors, (29316), 11269 states have internal predecessors, (29316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 29316 transitions. [2022-03-15 21:26:41,343 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 29316 transitions. Word has length 33 [2022-03-15 21:26:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:41,343 INFO L470 AbstractCegarLoop]: Abstraction has 11270 states and 29316 transitions. [2022-03-15 21:26:41,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 29316 transitions. [2022-03-15 21:26:41,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:41,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:41,354 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:41,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-03-15 21:26:41,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2022-03-15 21:26:41,570 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:41,571 INFO L85 PathProgramCache]: Analyzing trace with hash -880827255, now seen corresponding path program 441 times [2022-03-15 21:26:41,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:41,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136140268] [2022-03-15 21:26:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:41,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:41,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:41,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136140268] [2022-03-15 21:26:41,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136140268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:41,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348784197] [2022-03-15 21:26:41,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:26:41,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:41,715 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:41,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-03-15 21:26:41,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 21:26:41,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:41,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:41,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:42,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348784197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:42,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:42,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 24] total 37 [2022-03-15 21:26:42,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [275697063] [2022-03-15 21:26:42,077 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:42,079 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:42,088 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 61 transitions. [2022-03-15 21:26:42,088 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:42,312 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [6990674#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 6990670#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 6990673#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 6990671#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 6990669#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 6990672#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:26:42,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:26:42,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:42,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:26:42,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:26:42,313 INFO L87 Difference]: Start difference. First operand 11270 states and 29316 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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 21:26:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:43,349 INFO L93 Difference]: Finished difference Result 16027 states and 38036 transitions. [2022-03-15 21:26:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 21:26:43,350 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 33 [2022-03-15 21:26:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:43,379 INFO L225 Difference]: With dead ends: 16027 [2022-03-15 21:26:43,379 INFO L226 Difference]: Without dead ends: 16013 [2022-03-15 21:26:43,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3832 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3057, Invalid=8073, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 21:26:43,381 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 257 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:43,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16013 states. [2022-03-15 21:26:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16013 to 11174. [2022-03-15 21:26:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11174 states, 11173 states have (on average 2.601807929830842) internal successors, (29070), 11173 states have internal predecessors, (29070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 29070 transitions. [2022-03-15 21:26:43,597 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 29070 transitions. Word has length 33 [2022-03-15 21:26:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:43,597 INFO L470 AbstractCegarLoop]: Abstraction has 11174 states and 29070 transitions. [2022-03-15 21:26:43,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 21:26:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 29070 transitions. [2022-03-15 21:26:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:43,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:43,608 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:43,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:43,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2022-03-15 21:26:43,823 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:43,824 INFO L85 PathProgramCache]: Analyzing trace with hash -458341529, now seen corresponding path program 442 times [2022-03-15 21:26:43,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:43,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523528262] [2022-03-15 21:26:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:43,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 94 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:43,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:43,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523528262] [2022-03-15 21:26:43,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523528262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:43,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001830571] [2022-03-15 21:26:43,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:26:43,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:43,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:43,920 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:43,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-03-15 21:26:43,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:26:43,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:43,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 94 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:43,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 94 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:44,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001830571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:44,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:44,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 25] total 38 [2022-03-15 21:26:44,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2061453613] [2022-03-15 21:26:44,187 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:44,189 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:44,198 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 65 transitions. [2022-03-15 21:26:44,199 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:44,367 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [7029411#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 7029406#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7029408#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7029407#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7029409#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7029410#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7029405#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:44,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:26:44,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:26:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:26:44,368 INFO L87 Difference]: Start difference. First operand 11174 states and 29070 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:26:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:45,534 INFO L93 Difference]: Finished difference Result 13807 states and 33429 transitions. [2022-03-15 21:26:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 21:26:45,535 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 33 [2022-03-15 21:26:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:45,560 INFO L225 Difference]: With dead ends: 13807 [2022-03-15 21:26:45,560 INFO L226 Difference]: Without dead ends: 13807 [2022-03-15 21:26:45,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5554 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4065, Invalid=11435, Unknown=0, NotChecked=0, Total=15500 [2022-03-15 21:26:45,562 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 234 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:45,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13807 states. [2022-03-15 21:26:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13807 to 11052. [2022-03-15 21:26:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 11051 states have (on average 2.591258709619039) internal successors, (28636), 11051 states have internal predecessors, (28636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 28636 transitions. [2022-03-15 21:26:45,745 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 28636 transitions. Word has length 33 [2022-03-15 21:26:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:45,745 INFO L470 AbstractCegarLoop]: Abstraction has 11052 states and 28636 transitions. [2022-03-15 21:26:45,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:26:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 28636 transitions. [2022-03-15 21:26:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:45,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:45,757 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:45,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:45,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2022-03-15 21:26:45,973 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash -246185911, now seen corresponding path program 443 times [2022-03-15 21:26:45,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:45,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252601728] [2022-03-15 21:26:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:46,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:46,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252601728] [2022-03-15 21:26:46,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252601728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:46,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035327657] [2022-03-15 21:26:46,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:26:46,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:46,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:46,075 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:46,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-03-15 21:26:46,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:26:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:46,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:46,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035327657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:46,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:46,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 38 [2022-03-15 21:26:46,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2145519025] [2022-03-15 21:26:46,341 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:46,343 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:46,353 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 69 transitions. [2022-03-15 21:26:46,353 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:46,545 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [7065715#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7065719#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 7065714#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7065718#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 7065712#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7065713#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7065717#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7065716#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:26:46,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:26:46,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:46,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:26:46,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1623, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:26:46,546 INFO L87 Difference]: Start difference. First operand 11052 states and 28636 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:47,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:47,826 INFO L93 Difference]: Finished difference Result 14048 states and 34238 transitions. [2022-03-15 21:26:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-15 21:26:47,826 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:26:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:47,850 INFO L225 Difference]: With dead ends: 14048 [2022-03-15 21:26:47,850 INFO L226 Difference]: Without dead ends: 14048 [2022-03-15 21:26:47,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5631 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4298, Invalid=11958, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 21:26:47,852 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 274 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:47,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14048 states. [2022-03-15 21:26:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14048 to 11100. [2022-03-15 21:26:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11100 states, 11099 states have (on average 2.5929363005676187) internal successors, (28779), 11099 states have internal predecessors, (28779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11100 states to 11100 states and 28779 transitions. [2022-03-15 21:26:48,071 INFO L78 Accepts]: Start accepts. Automaton has 11100 states and 28779 transitions. Word has length 33 [2022-03-15 21:26:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:48,071 INFO L470 AbstractCegarLoop]: Abstraction has 11100 states and 28779 transitions. [2022-03-15 21:26:48,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 11100 states and 28779 transitions. [2022-03-15 21:26:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:48,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:48,082 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:48,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:48,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:48,295 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash -273113945, now seen corresponding path program 444 times [2022-03-15 21:26:48,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:48,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841660406] [2022-03-15 21:26:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:48,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:26:48,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:48,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841660406] [2022-03-15 21:26:48,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841660406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:48,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200567180] [2022-03-15 21:26:48,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:26:48,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:48,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:48,380 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:48,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-03-15 21:26:48,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:26:48,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:48,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:26:48,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:48,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200567180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:48,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:48,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 22] total 34 [2022-03-15 21:26:48,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1535563541] [2022-03-15 21:26:48,673 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:48,675 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:48,683 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:26:48,683 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:48,705 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [7102357#(< i2 (* 2 N)), 7102358#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:26:48,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:26:48,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:26:48,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=778, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:26:48,705 INFO L87 Difference]: Start difference. First operand 11100 states and 28779 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:48,989 INFO L93 Difference]: Finished difference Result 14699 states and 35734 transitions. [2022-03-15 21:26:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:26:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:26:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:49,014 INFO L225 Difference]: With dead ends: 14699 [2022-03-15 21:26:49,014 INFO L226 Difference]: Without dead ends: 14695 [2022-03-15 21:26:49,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1466, Invalid=2694, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:26:49,015 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 125 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:49,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14695 states. [2022-03-15 21:26:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14695 to 11189. [2022-03-15 21:26:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11189 states, 11188 states have (on average 2.5976939578119413) internal successors, (29063), 11188 states have internal predecessors, (29063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11189 states to 11189 states and 29063 transitions. [2022-03-15 21:26:49,208 INFO L78 Accepts]: Start accepts. Automaton has 11189 states and 29063 transitions. Word has length 33 [2022-03-15 21:26:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:49,208 INFO L470 AbstractCegarLoop]: Abstraction has 11189 states and 29063 transitions. [2022-03-15 21:26:49,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 11189 states and 29063 transitions. [2022-03-15 21:26:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:49,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:49,220 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:49,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:49,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-03-15 21:26:49,435 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash -594609085, now seen corresponding path program 445 times [2022-03-15 21:26:49,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:49,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010248475] [2022-03-15 21:26:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:49,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:49,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:49,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010248475] [2022-03-15 21:26:49,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010248475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:49,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107730561] [2022-03-15 21:26:49,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:26:49,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:49,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:49,496 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:49,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-03-15 21:26:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:49,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:49,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:49,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:49,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107730561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:49,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:49,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:26:49,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [293122537] [2022-03-15 21:26:49,750 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:49,752 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:49,760 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:26:49,760 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:49,770 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7139719#(< i2 (* 2 N))] [2022-03-15 21:26:49,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:26:49,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:49,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:26:49,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:26:49,770 INFO L87 Difference]: Start difference. First operand 11189 states and 29063 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:50,078 INFO L93 Difference]: Finished difference Result 15308 states and 37186 transitions. [2022-03-15 21:26:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 21:26:50,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:26:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:50,105 INFO L225 Difference]: With dead ends: 15308 [2022-03-15 21:26:50,105 INFO L226 Difference]: Without dead ends: 15304 [2022-03-15 21:26:50,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1514, Invalid=2776, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:26:50,106 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 143 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:50,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15304 states. [2022-03-15 21:26:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15304 to 11187. [2022-03-15 21:26:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11187 states, 11186 states have (on average 2.5955658859288397) internal successors, (29034), 11186 states have internal predecessors, (29034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11187 states to 11187 states and 29034 transitions. [2022-03-15 21:26:50,340 INFO L78 Accepts]: Start accepts. Automaton has 11187 states and 29034 transitions. Word has length 33 [2022-03-15 21:26:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:50,340 INFO L470 AbstractCegarLoop]: Abstraction has 11187 states and 29034 transitions. [2022-03-15 21:26:50,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 11187 states and 29034 transitions. [2022-03-15 21:26:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:50,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:50,352 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:50,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:50,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2022-03-15 21:26:50,569 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1093310425, now seen corresponding path program 446 times [2022-03-15 21:26:50,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:50,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671869720] [2022-03-15 21:26:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:50,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:50,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:50,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671869720] [2022-03-15 21:26:50,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671869720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:50,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972260751] [2022-03-15 21:26:50,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:26:50,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:50,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:50,633 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:50,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-03-15 21:26:50,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:26:50,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:50,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 107 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:50,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972260751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:50,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:50,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:26:50,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [863728784] [2022-03-15 21:26:50,914 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:50,916 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:50,924 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:26:50,924 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:50,958 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7177690#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:50,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:26:50,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:50,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:26:50,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:26:50,959 INFO L87 Difference]: Start difference. First operand 11187 states and 29034 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:51,246 INFO L93 Difference]: Finished difference Result 17160 states and 40989 transitions. [2022-03-15 21:26:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:26:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:26:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:51,276 INFO L225 Difference]: With dead ends: 17160 [2022-03-15 21:26:51,276 INFO L226 Difference]: Without dead ends: 17156 [2022-03-15 21:26:51,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1272, Invalid=2388, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:26:51,277 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 148 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:51,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17156 states. [2022-03-15 21:26:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17156 to 11187. [2022-03-15 21:26:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11187 states, 11186 states have (on average 2.5956552833899518) internal successors, (29035), 11186 states have internal predecessors, (29035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11187 states to 11187 states and 29035 transitions. [2022-03-15 21:26:51,490 INFO L78 Accepts]: Start accepts. Automaton has 11187 states and 29035 transitions. Word has length 33 [2022-03-15 21:26:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:51,490 INFO L470 AbstractCegarLoop]: Abstraction has 11187 states and 29035 transitions. [2022-03-15 21:26:51,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:26:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 11187 states and 29035 transitions. [2022-03-15 21:26:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:51,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:51,501 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:51,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:51,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2022-03-15 21:26:51,717 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1948617079, now seen corresponding path program 447 times [2022-03-15 21:26:51,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:51,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561494511] [2022-03-15 21:26:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:51,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:51,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:51,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561494511] [2022-03-15 21:26:51,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561494511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:51,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347576708] [2022-03-15 21:26:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:26:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:51,807 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:51,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-03-15 21:26:51,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:26:51,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:51,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:51,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:52,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347576708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:52,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:52,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 23] total 36 [2022-03-15 21:26:52,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [206622451] [2022-03-15 21:26:52,092 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:52,094 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:52,102 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:26:52,102 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:52,159 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [7217502#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7217503#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:26:52,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:26:52,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:26:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=911, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:26:52,159 INFO L87 Difference]: Start difference. First operand 11187 states and 29035 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:26:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:52,526 INFO L93 Difference]: Finished difference Result 18149 states and 43010 transitions. [2022-03-15 21:26:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 21:26:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:26:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:52,560 INFO L225 Difference]: With dead ends: 18149 [2022-03-15 21:26:52,560 INFO L226 Difference]: Without dead ends: 18143 [2022-03-15 21:26:52,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1641, Invalid=3471, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:26:52,561 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 176 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:52,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 1 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2022-03-15 21:26:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 11200. [2022-03-15 21:26:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11200 states, 11199 states have (on average 2.596124653986963) internal successors, (29074), 11199 states have internal predecessors, (29074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11200 states to 11200 states and 29074 transitions. [2022-03-15 21:26:52,800 INFO L78 Accepts]: Start accepts. Automaton has 11200 states and 29074 transitions. Word has length 33 [2022-03-15 21:26:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:52,800 INFO L470 AbstractCegarLoop]: Abstraction has 11200 states and 29074 transitions. [2022-03-15 21:26:52,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:26:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 11200 states and 29074 transitions. [2022-03-15 21:26:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:52,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:52,811 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:52,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:53,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2022-03-15 21:26:53,026 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1601647719, now seen corresponding path program 448 times [2022-03-15 21:26:53,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:53,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554910473] [2022-03-15 21:26:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:53,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:53,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554910473] [2022-03-15 21:26:53,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554910473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:53,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993075239] [2022-03-15 21:26:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:26:53,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:53,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:53,099 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:53,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-03-15 21:26:53,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:26:53,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:53,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:53,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:53,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993075239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:53,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:53,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:26:53,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [352132080] [2022-03-15 21:26:53,372 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:53,374 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:53,383 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:26:53,383 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:53,457 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [7258349#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7258348#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7258350#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:26:53,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:26:53,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:26:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:26:53,458 INFO L87 Difference]: Start difference. First operand 11200 states and 29074 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:26:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:53,996 INFO L93 Difference]: Finished difference Result 18627 states and 43877 transitions. [2022-03-15 21:26:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 21:26:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:26:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:54,027 INFO L225 Difference]: With dead ends: 18627 [2022-03-15 21:26:54,027 INFO L226 Difference]: Without dead ends: 18619 [2022-03-15 21:26:54,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2229, Invalid=5427, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 21:26:54,028 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 233 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:54,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:26:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18619 states. [2022-03-15 21:26:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18619 to 11216. [2022-03-15 21:26:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11216 states, 11215 states have (on average 2.5966116807846635) internal successors, (29121), 11215 states have internal predecessors, (29121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11216 states to 11216 states and 29121 transitions. [2022-03-15 21:26:54,238 INFO L78 Accepts]: Start accepts. Automaton has 11216 states and 29121 transitions. Word has length 33 [2022-03-15 21:26:54,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:54,238 INFO L470 AbstractCegarLoop]: Abstraction has 11216 states and 29121 transitions. [2022-03-15 21:26:54,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:26:54,238 INFO L276 IsEmpty]: Start isEmpty. Operand 11216 states and 29121 transitions. [2022-03-15 21:26:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:54,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:54,248 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:54,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Forceful destruction successful, exit code 0 [2022-03-15 21:26:54,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:54,464 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:54,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash -9293239, now seen corresponding path program 449 times [2022-03-15 21:26:54,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:54,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026206808] [2022-03-15 21:26:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:54,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:54,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026206808] [2022-03-15 21:26:54,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026206808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:54,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842632083] [2022-03-15 21:26:54,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:26:54,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:54,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:54,583 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:54,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-03-15 21:26:54,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:26:54,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:54,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:54,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:54,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842632083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:54,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:54,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 37 [2022-03-15 21:26:54,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [945304871] [2022-03-15 21:26:54,886 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:54,888 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:54,897 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:26:54,897 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:54,992 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [7299738#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7299739#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7299737#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7299736#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:54,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:26:54,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:26:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:26:54,993 INFO L87 Difference]: Start difference. First operand 11216 states and 29121 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:55,677 INFO L93 Difference]: Finished difference Result 18586 states and 43628 transitions. [2022-03-15 21:26:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 21:26:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 33 [2022-03-15 21:26:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:55,713 INFO L225 Difference]: With dead ends: 18586 [2022-03-15 21:26:55,713 INFO L226 Difference]: Without dead ends: 18576 [2022-03-15 21:26:55,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2493, Invalid=6063, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 21:26:55,714 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 234 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:55,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18576 states. [2022-03-15 21:26:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18576 to 11232. [2022-03-15 21:26:55,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.597097319918084) internal successors, (29168), 11231 states have internal predecessors, (29168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 29168 transitions. [2022-03-15 21:26:55,955 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 29168 transitions. Word has length 33 [2022-03-15 21:26:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:55,955 INFO L470 AbstractCegarLoop]: Abstraction has 11232 states and 29168 transitions. [2022-03-15 21:26:55,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 21:26:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 29168 transitions. [2022-03-15 21:26:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:55,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:55,967 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:55,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-03-15 21:26:56,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:56,171 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1591144615, now seen corresponding path program 450 times [2022-03-15 21:26:56,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:56,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592339971] [2022-03-15 21:26:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:56,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:56,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:56,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592339971] [2022-03-15 21:26:56,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592339971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:56,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733621807] [2022-03-15 21:26:56,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:26:56,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:56,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:56,265 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:56,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-03-15 21:26:56,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 21:26:56,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:26:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:56,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:56,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:56,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733621807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:56,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:56,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:26:56,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [434950421] [2022-03-15 21:26:56,584 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:56,586 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:56,595 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 57 transitions. [2022-03-15 21:26:56,595 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:56,711 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [7341123#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7341124#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7341125#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7341126#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7341122#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:26:56,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:26:56,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:26:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:26:56,712 INFO L87 Difference]: Start difference. First operand 11232 states and 29168 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:57,568 INFO L93 Difference]: Finished difference Result 18045 states and 42345 transitions. [2022-03-15 21:26:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 21:26:57,569 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 33 [2022-03-15 21:26:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:57,599 INFO L225 Difference]: With dead ends: 18045 [2022-03-15 21:26:57,599 INFO L226 Difference]: Without dead ends: 18033 [2022-03-15 21:26:57,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3280, Invalid=8710, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 21:26:57,601 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 241 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:57,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:26:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18033 states. [2022-03-15 21:26:57,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18033 to 11248. [2022-03-15 21:26:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11248 states, 11247 states have (on average 2.5975815773095046) internal successors, (29215), 11247 states have internal predecessors, (29215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:26:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11248 states to 11248 states and 29215 transitions. [2022-03-15 21:26:57,826 INFO L78 Accepts]: Start accepts. Automaton has 11248 states and 29215 transitions. Word has length 33 [2022-03-15 21:26:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:26:57,826 INFO L470 AbstractCegarLoop]: Abstraction has 11248 states and 29215 transitions. [2022-03-15 21:26:57,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 21:26:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 11248 states and 29215 transitions. [2022-03-15 21:26:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:26:57,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:26:57,838 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:26:57,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-03-15 21:26:58,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2022-03-15 21:26:58,051 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:26:58,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:26:58,052 INFO L85 PathProgramCache]: Analyzing trace with hash -334889463, now seen corresponding path program 451 times [2022-03-15 21:26:58,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:26:58,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661348658] [2022-03-15 21:26:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:26:58,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:26:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:58,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:26:58,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661348658] [2022-03-15 21:26:58,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661348658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:26:58,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383744695] [2022-03-15 21:26:58,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:26:58,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:26:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:26:58,226 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:26:58,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-03-15 21:26:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:26:58,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:26:58,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:26:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:26:58,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:26:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:26:58,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383744695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:26:58,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:26:58,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 25] total 38 [2022-03-15 21:26:58,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1004320660] [2022-03-15 21:26:58,566 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:26:58,568 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:26:58,576 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 61 transitions. [2022-03-15 21:26:58,577 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:26:58,757 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [7382034#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7382035#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7382037#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7382033#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7382038#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7382036#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:26:58,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:26:58,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:26:58,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:26:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:26:58,758 INFO L87 Difference]: Start difference. First operand 11248 states and 29215 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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 21:26:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:26:59,936 INFO L93 Difference]: Finished difference Result 16960 states and 39998 transitions. [2022-03-15 21:26:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 21:26:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 33 [2022-03-15 21:26:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:26:59,964 INFO L225 Difference]: With dead ends: 16960 [2022-03-15 21:26:59,964 INFO L226 Difference]: Without dead ends: 16946 [2022-03-15 21:26:59,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3351, Invalid=8859, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 21:26:59,966 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 259 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:26:59,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 1 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:26:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16946 states. [2022-03-15 21:27:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16946 to 11233. [2022-03-15 21:27:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11233 states, 11232 states have (on average 2.5980235042735043) internal successors, (29181), 11232 states have internal predecessors, (29181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11233 states to 11233 states and 29181 transitions. [2022-03-15 21:27:00,174 INFO L78 Accepts]: Start accepts. Automaton has 11233 states and 29181 transitions. Word has length 33 [2022-03-15 21:27:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:00,174 INFO L470 AbstractCegarLoop]: Abstraction has 11233 states and 29181 transitions. [2022-03-15 21:27:00,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 21:27:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 11233 states and 29181 transitions. [2022-03-15 21:27:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:00,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:00,185 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:00,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Ended with exit code 0 [2022-03-15 21:27:00,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:00,388 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:00,389 INFO L85 PathProgramCache]: Analyzing trace with hash 87596263, now seen corresponding path program 452 times [2022-03-15 21:27:00,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:00,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814947109] [2022-03-15 21:27:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:00,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:00,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:00,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814947109] [2022-03-15 21:27:00,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814947109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:00,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195006731] [2022-03-15 21:27:00,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:00,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:00,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:00,532 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:00,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-03-15 21:27:00,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:00,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:00,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:00,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:00,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:00,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195006731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:00,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:00,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 25] total 38 [2022-03-15 21:27:00,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [277363676] [2022-03-15 21:27:00,909 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:00,911 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:00,921 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 65 transitions. [2022-03-15 21:27:00,921 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:01,177 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [7421830#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7421828#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7421829#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7421833#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7421831#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7421834#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 7421832#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:27:01,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:27:01,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:01,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:27:01,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:27:01,178 INFO L87 Difference]: Start difference. First operand 11233 states and 29181 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:27:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:02,794 INFO L93 Difference]: Finished difference Result 15444 states and 36847 transitions. [2022-03-15 21:27:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 21:27:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 33 [2022-03-15 21:27:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:02,822 INFO L225 Difference]: With dead ends: 15444 [2022-03-15 21:27:02,822 INFO L226 Difference]: Without dead ends: 15428 [2022-03-15 21:27:02,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6047 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4412, Invalid=12358, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 21:27:02,824 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 252 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:02,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:27:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15428 states. [2022-03-15 21:27:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15428 to 11112. [2022-03-15 21:27:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11112 states, 11111 states have (on average 2.6022860228602287) internal successors, (28914), 11111 states have internal predecessors, (28914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11112 states to 11112 states and 28914 transitions. [2022-03-15 21:27:03,042 INFO L78 Accepts]: Start accepts. Automaton has 11112 states and 28914 transitions. Word has length 33 [2022-03-15 21:27:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:03,042 INFO L470 AbstractCegarLoop]: Abstraction has 11112 states and 28914 transitions. [2022-03-15 21:27:03,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:27:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 11112 states and 28914 transitions. [2022-03-15 21:27:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:03,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:03,054 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:03,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Ended with exit code 0 [2022-03-15 21:27:03,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-03-15 21:27:03,271 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash 299751881, now seen corresponding path program 453 times [2022-03-15 21:27:03,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:03,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594376589] [2022-03-15 21:27:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:03,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 93 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:03,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:03,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594376589] [2022-03-15 21:27:03,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594376589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:03,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417262005] [2022-03-15 21:27:03,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:03,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:03,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:03,385 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:03,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-03-15 21:27:03,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:27:03,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:03,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:03,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 93 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:03,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 93 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:03,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417262005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:03,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:03,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 26] total 39 [2022-03-15 21:27:03,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [4305891] [2022-03-15 21:27:03,708 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:03,710 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:03,720 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 69 transitions. [2022-03-15 21:27:03,720 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:03,985 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [7459903#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7459905#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7459908#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7459910#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 7459907#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7459904#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7459906#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7459909#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N)))] [2022-03-15 21:27:03,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:27:03,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:03,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:27:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=1688, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:27:03,986 INFO L87 Difference]: Start difference. First operand 11112 states and 28914 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:05,653 INFO L93 Difference]: Finished difference Result 13395 states and 32649 transitions. [2022-03-15 21:27:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 21:27:05,653 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:05,675 INFO L225 Difference]: With dead ends: 13395 [2022-03-15 21:27:05,675 INFO L226 Difference]: Without dead ends: 13395 [2022-03-15 21:27:05,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5475 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4092, Invalid=11658, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 21:27:05,677 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 249 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:05,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:27:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13395 states. [2022-03-15 21:27:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13395 to 10964. [2022-03-15 21:27:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10964 states, 10963 states have (on average 2.5927209705372616) internal successors, (28424), 10963 states have internal predecessors, (28424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10964 states to 10964 states and 28424 transitions. [2022-03-15 21:27:05,906 INFO L78 Accepts]: Start accepts. Automaton has 10964 states and 28424 transitions. Word has length 33 [2022-03-15 21:27:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:05,906 INFO L470 AbstractCegarLoop]: Abstraction has 10964 states and 28424 transitions. [2022-03-15 21:27:05,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 10964 states and 28424 transitions. [2022-03-15 21:27:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:05,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:05,916 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:05,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:06,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-03-15 21:27:06,135 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1713358553, now seen corresponding path program 454 times [2022-03-15 21:27:06,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:06,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050310461] [2022-03-15 21:27:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:06,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:06,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050310461] [2022-03-15 21:27:06,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050310461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:06,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948386835] [2022-03-15 21:27:06,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:06,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:06,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:06,257 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:06,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-03-15 21:27:06,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:06,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:06,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:06,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948386835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:06,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:06,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 26] total 39 [2022-03-15 21:27:06,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [616812727] [2022-03-15 21:27:06,520 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:06,522 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:06,532 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 73 transitions. [2022-03-15 21:27:06,532 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:06,749 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [7495625#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7495624#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7495626#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7495630#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 7495623#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7495627#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7495629#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 7495628#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 7495622#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:27:06,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:27:06,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:27:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1791, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:27:06,750 INFO L87 Difference]: Start difference. First operand 10964 states and 28424 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:08,425 INFO L93 Difference]: Finished difference Result 13623 states and 33426 transitions. [2022-03-15 21:27:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-15 21:27:08,425 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:08,449 INFO L225 Difference]: With dead ends: 13623 [2022-03-15 21:27:08,449 INFO L226 Difference]: Without dead ends: 13623 [2022-03-15 21:27:08,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8522 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=6103, Invalid=17459, Unknown=0, NotChecked=0, Total=23562 [2022-03-15 21:27:08,452 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 309 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:08,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:27:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13623 states. [2022-03-15 21:27:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13623 to 11018. [2022-03-15 21:27:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11018 states, 11017 states have (on average 2.5946264863392936) internal successors, (28585), 11017 states have internal predecessors, (28585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11018 states to 11018 states and 28585 transitions. [2022-03-15 21:27:08,633 INFO L78 Accepts]: Start accepts. Automaton has 11018 states and 28585 transitions. Word has length 33 [2022-03-15 21:27:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:08,633 INFO L470 AbstractCegarLoop]: Abstraction has 11018 states and 28585 transitions. [2022-03-15 21:27:08,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 11018 states and 28585 transitions. [2022-03-15 21:27:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:08,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:08,643 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:08,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:08,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2022-03-15 21:27:08,859 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:08,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1334932297, now seen corresponding path program 455 times [2022-03-15 21:27:08,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:08,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674192321] [2022-03-15 21:27:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:08,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:27:08,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:08,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674192321] [2022-03-15 21:27:08,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674192321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:08,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571447709] [2022-03-15 21:27:08,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:08,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:08,919 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:08,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-03-15 21:27:08,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:27:08,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:08,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:08,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:27:08,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:09,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571447709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:09,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:09,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 33 [2022-03-15 21:27:09,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926731567] [2022-03-15 21:27:09,199 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:09,201 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:09,208 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:27:09,208 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:09,229 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [7531727#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 7531726#(< i2 (* 2 N))] [2022-03-15 21:27:09,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:27:09,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:27:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=735, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:27:09,230 INFO L87 Difference]: Start difference. First operand 11018 states and 28585 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:27:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:09,515 INFO L93 Difference]: Finished difference Result 14088 states and 34529 transitions. [2022-03-15 21:27:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:27:09,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:27:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:09,539 INFO L225 Difference]: With dead ends: 14088 [2022-03-15 21:27:09,540 INFO L226 Difference]: Without dead ends: 14084 [2022-03-15 21:27:09,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1472, Invalid=2818, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:27:09,540 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 128 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:09,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14084 states. [2022-03-15 21:27:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14084 to 10841. [2022-03-15 21:27:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10841 states, 10840 states have (on average 2.5867158671586714) internal successors, (28040), 10840 states have internal predecessors, (28040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10841 states to 10841 states and 28040 transitions. [2022-03-15 21:27:09,718 INFO L78 Accepts]: Start accepts. Automaton has 10841 states and 28040 transitions. Word has length 33 [2022-03-15 21:27:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:09,718 INFO L470 AbstractCegarLoop]: Abstraction has 10841 states and 28040 transitions. [2022-03-15 21:27:09,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:27:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 10841 states and 28040 transitions. [2022-03-15 21:27:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:09,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:09,729 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:09,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Ended with exit code 0 [2022-03-15 21:27:09,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:09,933 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash -850406717, now seen corresponding path program 456 times [2022-03-15 21:27:09,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:09,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099536239] [2022-03-15 21:27:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:10,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:10,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099536239] [2022-03-15 21:27:10,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099536239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:10,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119306265] [2022-03-15 21:27:10,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:10,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:10,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:10,026 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:10,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-03-15 21:27:10,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:27:10,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:10,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:10,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:10,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119306265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:10,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:10,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:27:10,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [545025659] [2022-03-15 21:27:10,380 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:10,382 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:10,389 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:27:10,389 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:10,404 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7567785#(< i2 (* 2 N))] [2022-03-15 21:27:10,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:27:10,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:27:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:27:10,405 INFO L87 Difference]: Start difference. First operand 10841 states and 28040 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:10,780 INFO L93 Difference]: Finished difference Result 14232 states and 34558 transitions. [2022-03-15 21:27:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:27:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:10,805 INFO L225 Difference]: With dead ends: 14232 [2022-03-15 21:27:10,805 INFO L226 Difference]: Without dead ends: 14228 [2022-03-15 21:27:10,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1573, Invalid=2983, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:27:10,806 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 131 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:10,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14228 states. [2022-03-15 21:27:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14228 to 10839. [2022-03-15 21:27:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10839 states, 10838 states have (on average 2.5855323860490866) internal successors, (28022), 10838 states have internal predecessors, (28022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 28022 transitions. [2022-03-15 21:27:10,988 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 28022 transitions. Word has length 33 [2022-03-15 21:27:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:10,988 INFO L470 AbstractCegarLoop]: Abstraction has 10839 states and 28022 transitions. [2022-03-15 21:27:10,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 28022 transitions. [2022-03-15 21:27:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:10,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:10,999 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:11,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:11,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:11,215 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1349108057, now seen corresponding path program 457 times [2022-03-15 21:27:11,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:11,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167282072] [2022-03-15 21:27:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:11,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:11,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:11,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167282072] [2022-03-15 21:27:11,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167282072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:11,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007465393] [2022-03-15 21:27:11,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:11,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:11,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:11,280 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:11,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-03-15 21:27:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:11,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:11,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007465393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:11,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:11,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:27:11,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1834742620] [2022-03-15 21:27:11,564 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:11,566 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:11,573 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:27:11,573 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:11,607 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7603988#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:27:11,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:27:11,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:11,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:27:11,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:27:11,608 INFO L87 Difference]: Start difference. First operand 10839 states and 28022 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:27:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:11,889 INFO L93 Difference]: Finished difference Result 15558 states and 37188 transitions. [2022-03-15 21:27:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:27:11,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:27:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:11,912 INFO L225 Difference]: With dead ends: 15558 [2022-03-15 21:27:11,913 INFO L226 Difference]: Without dead ends: 15554 [2022-03-15 21:27:11,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1302, Invalid=2480, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:27:11,913 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 160 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:11,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15554 states. [2022-03-15 21:27:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15554 to 10842. [2022-03-15 21:27:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10842 states, 10841 states have (on average 2.5854625957015034) internal successors, (28029), 10841 states have internal predecessors, (28029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10842 states to 10842 states and 28029 transitions. [2022-03-15 21:27:12,087 INFO L78 Accepts]: Start accepts. Automaton has 10842 states and 28029 transitions. Word has length 33 [2022-03-15 21:27:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:12,087 INFO L470 AbstractCegarLoop]: Abstraction has 10842 states and 28029 transitions. [2022-03-15 21:27:12,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:27:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 10842 states and 28029 transitions. [2022-03-15 21:27:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:12,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:12,097 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:12,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:12,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2022-03-15 21:27:12,312 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2090552585, now seen corresponding path program 458 times [2022-03-15 21:27:12,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:12,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937130785] [2022-03-15 21:27:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:12,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:12,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:12,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937130785] [2022-03-15 21:27:12,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937130785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:12,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999925385] [2022-03-15 21:27:12,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:12,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:12,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:12,456 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:12,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-03-15 21:27:12,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:12,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:12,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:12,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999925385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:12,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:12,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 22] total 35 [2022-03-15 21:27:12,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1485581266] [2022-03-15 21:27:12,864 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:12,866 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:12,873 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:27:12,873 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:12,955 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [7641510#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7641509#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:27:12,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:27:12,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:27:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=867, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:27:12,956 INFO L87 Difference]: Start difference. First operand 10842 states and 28029 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:27:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:13,367 INFO L93 Difference]: Finished difference Result 16400 states and 38843 transitions. [2022-03-15 21:27:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:27:13,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:27:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:13,397 INFO L225 Difference]: With dead ends: 16400 [2022-03-15 21:27:13,397 INFO L226 Difference]: Without dead ends: 16394 [2022-03-15 21:27:13,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1654, Invalid=3602, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:27:13,398 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 164 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:13,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16394 states. [2022-03-15 21:27:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16394 to 10848. [2022-03-15 21:27:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10848 states, 10847 states have (on average 2.5856918963768782) internal successors, (28047), 10847 states have internal predecessors, (28047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 28047 transitions. [2022-03-15 21:27:13,596 INFO L78 Accepts]: Start accepts. Automaton has 10848 states and 28047 transitions. Word has length 33 [2022-03-15 21:27:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:13,596 INFO L470 AbstractCegarLoop]: Abstraction has 10848 states and 28047 transitions. [2022-03-15 21:27:13,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:27:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 10848 states and 28047 transitions. [2022-03-15 21:27:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:13,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:13,606 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:13,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:13,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:13,822 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1345850087, now seen corresponding path program 459 times [2022-03-15 21:27:13,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:13,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158291877] [2022-03-15 21:27:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:13,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:13,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158291877] [2022-03-15 21:27:13,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158291877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:13,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200659616] [2022-03-15 21:27:13,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:13,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:13,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:13,902 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:13,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-03-15 21:27:13,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:27:13,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:13,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 98 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:14,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200659616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:14,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:14,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:27:14,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1791582380] [2022-03-15 21:27:14,205 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:14,207 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:14,215 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:27:14,215 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:14,295 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [7679908#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7679907#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7679906#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:27:14,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:27:14,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:27:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:14,296 INFO L87 Difference]: Start difference. First operand 10848 states and 28047 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:27:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:15,030 INFO L93 Difference]: Finished difference Result 16873 states and 39685 transitions. [2022-03-15 21:27:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 21:27:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:27:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:15,057 INFO L225 Difference]: With dead ends: 16873 [2022-03-15 21:27:15,057 INFO L226 Difference]: Without dead ends: 16865 [2022-03-15 21:27:15,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2300, Invalid=5710, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:27:15,058 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 222 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:15,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:27:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16865 states. [2022-03-15 21:27:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16865 to 10856. [2022-03-15 21:27:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10856 states, 10855 states have (on average 2.5859051128512207) internal successors, (28070), 10855 states have internal predecessors, (28070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10856 states to 10856 states and 28070 transitions. [2022-03-15 21:27:15,256 INFO L78 Accepts]: Start accepts. Automaton has 10856 states and 28070 transitions. Word has length 33 [2022-03-15 21:27:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:15,256 INFO L470 AbstractCegarLoop]: Abstraction has 10856 states and 28070 transitions. [2022-03-15 21:27:15,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:27:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10856 states and 28070 transitions. [2022-03-15 21:27:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:15,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:15,268 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:15,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:15,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:15,485 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash -265090871, now seen corresponding path program 460 times [2022-03-15 21:27:15,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:15,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916720248] [2022-03-15 21:27:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:15,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:15,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:15,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916720248] [2022-03-15 21:27:15,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916720248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:15,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555478525] [2022-03-15 21:27:15,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:15,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:15,595 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:15,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-03-15 21:27:15,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:15,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:15,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555478525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:15,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:15,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 36 [2022-03-15 21:27:15,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1613462098] [2022-03-15 21:27:15,977 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:15,979 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:15,987 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:27:15,987 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:16,097 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [7718824#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7718823#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7718825#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7718826#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:27:16,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:27:16,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:27:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:27:16,098 INFO L87 Difference]: Start difference. First operand 10856 states and 28070 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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 21:27:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:16,726 INFO L93 Difference]: Finished difference Result 16998 states and 39789 transitions. [2022-03-15 21:27:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 21:27:16,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 33 [2022-03-15 21:27:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:16,753 INFO L225 Difference]: With dead ends: 16998 [2022-03-15 21:27:16,753 INFO L226 Difference]: Without dead ends: 16988 [2022-03-15 21:27:16,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2570, Invalid=6360, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:27:16,755 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 219 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:16,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:27:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16988 states. [2022-03-15 21:27:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16988 to 10864. [2022-03-15 21:27:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10864 states, 10863 states have (on average 2.58611801528123) internal successors, (28093), 10863 states have internal predecessors, (28093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10864 states to 10864 states and 28093 transitions. [2022-03-15 21:27:16,943 INFO L78 Accepts]: Start accepts. Automaton has 10864 states and 28093 transitions. Word has length 33 [2022-03-15 21:27:16,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:16,943 INFO L470 AbstractCegarLoop]: Abstraction has 10864 states and 28093 transitions. [2022-03-15 21:27:16,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 21:27:16,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10864 states and 28093 transitions. [2022-03-15 21:27:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:16,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:16,953 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:16,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:17,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:17,163 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:17,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:17,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1335346983, now seen corresponding path program 461 times [2022-03-15 21:27:17,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:17,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087595261] [2022-03-15 21:27:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:17,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:17,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:17,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087595261] [2022-03-15 21:27:17,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087595261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:17,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851252194] [2022-03-15 21:27:17,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:17,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:17,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:17,267 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:17,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-03-15 21:27:17,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:27:17,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:17,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:17,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:17,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:17,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851252194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:17,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:17,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:27:17,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [50368319] [2022-03-15 21:27:17,608 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:17,610 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:17,619 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 57 transitions. [2022-03-15 21:27:17,619 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:17,769 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [7757895#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7757892#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7757894#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7757893#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7757891#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:27:17,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:27:17,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:27:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:27:17,770 INFO L87 Difference]: Start difference. First operand 10864 states and 28093 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) 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 21:27:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:18,691 INFO L93 Difference]: Finished difference Result 16816 states and 39273 transitions. [2022-03-15 21:27:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 21:27:18,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 33 [2022-03-15 21:27:18,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:18,725 INFO L225 Difference]: With dead ends: 16816 [2022-03-15 21:27:18,725 INFO L226 Difference]: Without dead ends: 16804 [2022-03-15 21:27:18,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4607 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3410, Invalid=9246, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 21:27:18,726 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 230 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:18,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 1 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:27:18,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16804 states. [2022-03-15 21:27:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16804 to 10872. [2022-03-15 21:27:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10872 states, 10871 states have (on average 2.5863306043602243) internal successors, (28116), 10871 states have internal predecessors, (28116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10872 states to 10872 states and 28116 transitions. [2022-03-15 21:27:18,908 INFO L78 Accepts]: Start accepts. Automaton has 10872 states and 28116 transitions. Word has length 33 [2022-03-15 21:27:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:18,908 INFO L470 AbstractCegarLoop]: Abstraction has 10872 states and 28116 transitions. [2022-03-15 21:27:18,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 21:27:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 10872 states and 28116 transitions. [2022-03-15 21:27:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:18,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:18,918 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:18,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-03-15 21:27:19,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:19,133 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash -590687095, now seen corresponding path program 462 times [2022-03-15 21:27:19,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:19,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492976541] [2022-03-15 21:27:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:19,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:19,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:19,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492976541] [2022-03-15 21:27:19,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492976541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:19,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276301815] [2022-03-15 21:27:19,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:19,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:19,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:19,277 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:19,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-03-15 21:27:19,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:27:19,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:19,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:19,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 95 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:19,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276301815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:19,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:19,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 24] total 37 [2022-03-15 21:27:19,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [94778695] [2022-03-15 21:27:19,620 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:19,622 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:19,631 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 61 transitions. [2022-03-15 21:27:19,631 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:19,811 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [7796826#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7796830#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7796829#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7796828#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7796827#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7796831#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:27:19,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:27:19,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:27:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:27:19,812 INFO L87 Difference]: Start difference. First operand 10872 states and 28116 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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 21:27:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:21,009 INFO L93 Difference]: Finished difference Result 16257 states and 38044 transitions. [2022-03-15 21:27:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 21:27:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 33 [2022-03-15 21:27:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:21,035 INFO L225 Difference]: With dead ends: 16257 [2022-03-15 21:27:21,035 INFO L226 Difference]: Without dead ends: 16243 [2022-03-15 21:27:21,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4540 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3524, Invalid=9358, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 21:27:21,036 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 240 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:21,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:27:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16243 states. [2022-03-15 21:27:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16243 to 10880. [2022-03-15 21:27:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10880 states, 10879 states have (on average 2.5865428807794832) internal successors, (28139), 10879 states have internal predecessors, (28139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10880 states to 10880 states and 28139 transitions. [2022-03-15 21:27:21,242 INFO L78 Accepts]: Start accepts. Automaton has 10880 states and 28139 transitions. Word has length 33 [2022-03-15 21:27:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:21,242 INFO L470 AbstractCegarLoop]: Abstraction has 10880 states and 28139 transitions. [2022-03-15 21:27:21,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 21:27:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 10880 states and 28139 transitions. [2022-03-15 21:27:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:21,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:21,252 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:21,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:21,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-03-15 21:27:21,467 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:21,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash -168201369, now seen corresponding path program 463 times [2022-03-15 21:27:21,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:21,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898144809] [2022-03-15 21:27:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:21,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 94 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:21,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:21,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898144809] [2022-03-15 21:27:21,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898144809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:21,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646326576] [2022-03-15 21:27:21,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:21,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:21,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:21,584 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:21,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-03-15 21:27:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:21,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:21,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 94 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:21,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 94 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:21,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646326576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:21,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:21,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 25] total 38 [2022-03-15 21:27:21,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1708165827] [2022-03-15 21:27:21,958 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:21,960 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:21,969 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 65 transitions. [2022-03-15 21:27:21,969 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:22,230 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [7835223#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7835225#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7835221#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7835226#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 7835224#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7835220#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7835222#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:27:22,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:27:22,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:22,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:27:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:27:22,231 INFO L87 Difference]: Start difference. First operand 10880 states and 28139 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:27:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:23,987 INFO L93 Difference]: Finished difference Result 15457 states and 36419 transitions. [2022-03-15 21:27:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 21:27:23,987 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 33 [2022-03-15 21:27:23,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:24,013 INFO L225 Difference]: With dead ends: 15457 [2022-03-15 21:27:24,013 INFO L226 Difference]: Without dead ends: 15441 [2022-03-15 21:27:24,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6432 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4586, Invalid=12970, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 21:27:24,016 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 267 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:24,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 1 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:27:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15441 states. [2022-03-15 21:27:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15441 to 10848. [2022-03-15 21:27:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10848 states, 10847 states have (on average 2.5883654466672814) internal successors, (28076), 10847 states have internal predecessors, (28076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10848 states to 10848 states and 28076 transitions. [2022-03-15 21:27:24,214 INFO L78 Accepts]: Start accepts. Automaton has 10848 states and 28076 transitions. Word has length 33 [2022-03-15 21:27:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:24,214 INFO L470 AbstractCegarLoop]: Abstraction has 10848 states and 28076 transitions. [2022-03-15 21:27:24,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:27:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 10848 states and 28076 transitions. [2022-03-15 21:27:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:24,225 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:24,225 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:24,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Ended with exit code 0 [2022-03-15 21:27:24,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-03-15 21:27:24,435 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 43954249, now seen corresponding path program 464 times [2022-03-15 21:27:24,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:24,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786320324] [2022-03-15 21:27:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:24,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 93 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:24,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:24,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786320324] [2022-03-15 21:27:24,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786320324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:24,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785547835] [2022-03-15 21:27:24,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:24,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:24,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:24,575 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:24,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-03-15 21:27:24,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:24,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:24,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 93 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:24,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 93 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:25,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785547835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:25,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:25,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 38 [2022-03-15 21:27:25,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [681311169] [2022-03-15 21:27:25,011 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:25,013 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:25,023 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 69 transitions. [2022-03-15 21:27:25,023 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:25,230 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [7872788#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7872785#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7872789#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7872791#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 7872790#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7872787#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7872786#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7872792#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2)))] [2022-03-15 21:27:25,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:27:25,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:27:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1623, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:27:25,231 INFO L87 Difference]: Start difference. First operand 10848 states and 28076 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:26,418 INFO L93 Difference]: Finished difference Result 14190 states and 33939 transitions. [2022-03-15 21:27:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 21:27:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:26,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:26,440 INFO L225 Difference]: With dead ends: 14190 [2022-03-15 21:27:26,440 INFO L226 Difference]: Without dead ends: 14172 [2022-03-15 21:27:26,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4396, Invalid=12374, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 21:27:26,442 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 251 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:26,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:27:26,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14172 states. [2022-03-15 21:27:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14172 to 10739. [2022-03-15 21:27:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10739 states, 10738 states have (on average 2.5934065934065935) internal successors, (27848), 10738 states have internal predecessors, (27848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10739 states to 10739 states and 27848 transitions. [2022-03-15 21:27:26,603 INFO L78 Accepts]: Start accepts. Automaton has 10739 states and 27848 transitions. Word has length 33 [2022-03-15 21:27:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:26,603 INFO L470 AbstractCegarLoop]: Abstraction has 10739 states and 27848 transitions. [2022-03-15 21:27:26,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 10739 states and 27848 transitions. [2022-03-15 21:27:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:26,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:26,614 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:26,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:26,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2022-03-15 21:27:26,827 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:26,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:26,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1969156185, now seen corresponding path program 465 times [2022-03-15 21:27:26,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:26,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283907266] [2022-03-15 21:27:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:26,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 92 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:26,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:26,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283907266] [2022-03-15 21:27:26,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283907266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:26,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5359939] [2022-03-15 21:27:26,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:26,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:26,957 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:26,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-03-15 21:27:26,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:27:26,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:26,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:26,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 92 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:27,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 92 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:27,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5359939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:27,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:27,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 26] total 39 [2022-03-15 21:27:27,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [468933191] [2022-03-15 21:27:27,226 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:27,228 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:27,237 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 73 transitions. [2022-03-15 21:27:27,237 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:27,471 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [7908865#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 7908867#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 7908860#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7908859#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7908861#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 7908862#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7908866#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 7908864#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7908863#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N)))] [2022-03-15 21:27:27,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:27:27,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:27:27,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1791, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:27:27,472 INFO L87 Difference]: Start difference. First operand 10739 states and 27848 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:29,518 INFO L93 Difference]: Finished difference Result 12918 states and 31578 transitions. [2022-03-15 21:27:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-15 21:27:29,518 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:29,539 INFO L225 Difference]: With dead ends: 12918 [2022-03-15 21:27:29,540 INFO L226 Difference]: Without dead ends: 12918 [2022-03-15 21:27:29,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7933 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5540, Invalid=16216, Unknown=0, NotChecked=0, Total=21756 [2022-03-15 21:27:29,542 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 243 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:29,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:27:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12918 states. [2022-03-15 21:27:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12918 to 10660. [2022-03-15 21:27:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10660 states, 10659 states have (on average 2.589642555586828) internal successors, (27603), 10659 states have internal predecessors, (27603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10660 states to 10660 states and 27603 transitions. [2022-03-15 21:27:29,721 INFO L78 Accepts]: Start accepts. Automaton has 10660 states and 27603 transitions. Word has length 33 [2022-03-15 21:27:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:29,722 INFO L470 AbstractCegarLoop]: Abstraction has 10660 states and 27603 transitions. [2022-03-15 21:27:29,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10660 states and 27603 transitions. [2022-03-15 21:27:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:29,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:29,732 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:29,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:29,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:29,935 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash 48929801, now seen corresponding path program 466 times [2022-03-15 21:27:29,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:29,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52942551] [2022-03-15 21:27:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:29,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:30,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:30,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52942551] [2022-03-15 21:27:30,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52942551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:30,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872514717] [2022-03-15 21:27:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:30,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:30,123 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:30,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-03-15 21:27:30,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:30,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:30,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:30,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:30,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:30,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872514717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:30,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:30,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 39 [2022-03-15 21:27:30,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1827656852] [2022-03-15 21:27:30,444 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:30,446 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:30,456 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 77 transitions. [2022-03-15 21:27:30,456 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:30,772 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [7943539#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 7943540#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 7943544#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 7943537#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 7943545#(or (<= (* 2 N) (+ 9 i2)) (<= (+ i2 11) (* 2 N))), 7943536#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 7943543#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 7943541#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 7943542#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 7943538#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:27:30,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:27:30,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:27:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=1893, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:27:30,773 INFO L87 Difference]: Start difference. First operand 10660 states and 27603 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:32,593 INFO L93 Difference]: Finished difference Result 12769 states and 31503 transitions. [2022-03-15 21:27:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-15 21:27:32,593 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:32,657 INFO L225 Difference]: With dead ends: 12769 [2022-03-15 21:27:32,657 INFO L226 Difference]: Without dead ends: 12769 [2022-03-15 21:27:32,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8025 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5830, Invalid=16820, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 21:27:32,658 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 302 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:32,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:27:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12769 states. [2022-03-15 21:27:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12769 to 10522. [2022-03-15 21:27:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10522 states, 10521 states have (on average 2.5835947153312424) internal successors, (27182), 10521 states have internal predecessors, (27182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10522 states to 10522 states and 27182 transitions. [2022-03-15 21:27:32,806 INFO L78 Accepts]: Start accepts. Automaton has 10522 states and 27182 transitions. Word has length 33 [2022-03-15 21:27:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:32,806 INFO L470 AbstractCegarLoop]: Abstraction has 10522 states and 27182 transitions. [2022-03-15 21:27:32,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10522 states and 27182 transitions. [2022-03-15 21:27:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:32,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:32,817 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:32,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:33,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:33,032 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash -616467773, now seen corresponding path program 467 times [2022-03-15 21:27:33,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:33,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098364442] [2022-03-15 21:27:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:33,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:33,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:33,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098364442] [2022-03-15 21:27:33,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098364442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:33,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344218381] [2022-03-15 21:27:33,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:33,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:33,148 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:33,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-03-15 21:27:33,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:27:33,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:33,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:33,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:33,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344218381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:33,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:33,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 25] total 37 [2022-03-15 21:27:33,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [973486269] [2022-03-15 21:27:33,374 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:33,376 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:33,384 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 59 transitions. [2022-03-15 21:27:33,384 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:33,551 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [7977792#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 7977799#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 7977800#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 8))), 7977791#(< i2 (* 2 N)), 7977798#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 7977793#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 7977796#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 7977797#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 7977794#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 7977795#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 7977801#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 9 i1)))] [2022-03-15 21:27:33,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:27:33,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:33,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:27:33,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=1659, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:27:33,552 INFO L87 Difference]: Start difference. First operand 10522 states and 27182 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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 21:27:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:33,886 INFO L93 Difference]: Finished difference Result 12402 states and 31150 transitions. [2022-03-15 21:27:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:27:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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 33 [2022-03-15 21:27:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:33,906 INFO L225 Difference]: With dead ends: 12402 [2022-03-15 21:27:33,906 INFO L226 Difference]: Without dead ends: 12391 [2022-03-15 21:27:33,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1583, Invalid=3529, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:27:33,907 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 330 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:33,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12391 states. [2022-03-15 21:27:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12391 to 11068. [2022-03-15 21:27:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11068 states, 11067 states have (on average 2.6178729556338665) internal successors, (28972), 11067 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11068 states to 11068 states and 28972 transitions. [2022-03-15 21:27:34,065 INFO L78 Accepts]: Start accepts. Automaton has 11068 states and 28972 transitions. Word has length 33 [2022-03-15 21:27:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:34,065 INFO L470 AbstractCegarLoop]: Abstraction has 11068 states and 28972 transitions. [2022-03-15 21:27:34,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 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 21:27:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 11068 states and 28972 transitions. [2022-03-15 21:27:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:34,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:34,076 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:34,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:34,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2022-03-15 21:27:34,290 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1741037287, now seen corresponding path program 468 times [2022-03-15 21:27:34,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:34,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446885577] [2022-03-15 21:27:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:34,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:34,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:34,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446885577] [2022-03-15 21:27:34,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446885577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:34,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426674649] [2022-03-15 21:27:34,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:34,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:34,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:34,395 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:34,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-03-15 21:27:34,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:27:34,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:34,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:34,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:34,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:34,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426674649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:34,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:34,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 26] total 38 [2022-03-15 21:27:34,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [712004398] [2022-03-15 21:27:34,639 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:34,641 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:34,649 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 57 transitions. [2022-03-15 21:27:34,650 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:34,803 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [8012618#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8012619#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8012620#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8012623#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8012626#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 8))), 8012621#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8012625#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 8012622#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8012617#(< i2 (* 2 N)), 8012624#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1)))] [2022-03-15 21:27:34,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:27:34,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:27:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=1628, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:27:34,804 INFO L87 Difference]: Start difference. First operand 11068 states and 28972 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 21:27:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:35,140 INFO L93 Difference]: Finished difference Result 12829 states and 32032 transitions. [2022-03-15 21:27:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:27:35,141 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 33 [2022-03-15 21:27:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:35,162 INFO L225 Difference]: With dead ends: 12829 [2022-03-15 21:27:35,162 INFO L226 Difference]: Without dead ends: 12819 [2022-03-15 21:27:35,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1654, Invalid=3602, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:27:35,163 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 305 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:35,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12819 states. [2022-03-15 21:27:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12819 to 10987. [2022-03-15 21:27:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10987 states, 10986 states have (on average 2.6104132532313855) internal successors, (28678), 10986 states have internal predecessors, (28678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10987 states to 10987 states and 28678 transitions. [2022-03-15 21:27:35,356 INFO L78 Accepts]: Start accepts. Automaton has 10987 states and 28678 transitions. Word has length 33 [2022-03-15 21:27:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:35,356 INFO L470 AbstractCegarLoop]: Abstraction has 10987 states and 28678 transitions. [2022-03-15 21:27:35,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 33 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 21:27:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10987 states and 28678 transitions. [2022-03-15 21:27:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:35,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:35,367 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:35,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:35,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:35,583 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash -676766141, now seen corresponding path program 469 times [2022-03-15 21:27:35,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:35,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698953327] [2022-03-15 21:27:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:35,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:35,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:35,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698953327] [2022-03-15 21:27:35,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698953327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:35,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916094173] [2022-03-15 21:27:35,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:35,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:35,680 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:35,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-03-15 21:27:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:35,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:35,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:35,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:35,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916094173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:35,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:35,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 24] total 36 [2022-03-15 21:27:35,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [28125116] [2022-03-15 21:27:35,913 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:35,915 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:35,924 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2022-03-15 21:27:35,924 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:36,054 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [8047713#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8047710#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8047714#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 8047712#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8047707#(< i2 (* 2 N)), 8047708#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8047711#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8047709#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8047715#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1)))] [2022-03-15 21:27:36,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:27:36,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:36,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:27:36,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1419, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:27:36,055 INFO L87 Difference]: Start difference. First operand 10987 states and 28678 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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 21:27:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:36,377 INFO L93 Difference]: Finished difference Result 13158 states and 32692 transitions. [2022-03-15 21:27:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:27:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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 33 [2022-03-15 21:27:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:36,400 INFO L225 Difference]: With dead ends: 13158 [2022-03-15 21:27:36,400 INFO L226 Difference]: Without dead ends: 13149 [2022-03-15 21:27:36,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1595, Invalid=3375, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:27:36,401 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 245 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:36,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 1 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13149 states. [2022-03-15 21:27:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13149 to 10903. [2022-03-15 21:27:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10903 states, 10902 states have (on average 2.6033755274261603) internal successors, (28382), 10902 states have internal predecessors, (28382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10903 states to 10903 states and 28382 transitions. [2022-03-15 21:27:36,582 INFO L78 Accepts]: Start accepts. Automaton has 10903 states and 28382 transitions. Word has length 33 [2022-03-15 21:27:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:36,582 INFO L470 AbstractCegarLoop]: Abstraction has 10903 states and 28382 transitions. [2022-03-15 21:27:36,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 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 21:27:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 10903 states and 28382 transitions. [2022-03-15 21:27:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:36,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:36,594 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:36,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:36,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:36,811 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:36,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1863138457, now seen corresponding path program 470 times [2022-03-15 21:27:36,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:36,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630460516] [2022-03-15 21:27:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:36,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:36,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630460516] [2022-03-15 21:27:36,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630460516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:36,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576024521] [2022-03-15 21:27:36,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:36,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:36,899 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:36,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-03-15 21:27:36,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:36,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:37,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576024521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:37,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:37,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 25] total 37 [2022-03-15 21:27:37,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1517397654] [2022-03-15 21:27:37,191 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:37,193 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:37,202 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:27:37,202 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:37,326 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [8082963#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8082961#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8082965#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8082967#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 8082966#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8082962#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8082960#(< i2 (* 2 N)), 8082964#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:27:37,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:27:37,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:37,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:27:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=1389, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:27:37,327 INFO L87 Difference]: Start difference. First operand 10903 states and 28382 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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 21:27:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:37,643 INFO L93 Difference]: Finished difference Result 13374 states and 33085 transitions. [2022-03-15 21:27:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:27:37,643 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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 33 [2022-03-15 21:27:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:37,665 INFO L225 Difference]: With dead ends: 13374 [2022-03-15 21:27:37,665 INFO L226 Difference]: Without dead ends: 13366 [2022-03-15 21:27:37,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1664, Invalid=3448, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:27:37,666 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 237 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:37,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13366 states. [2022-03-15 21:27:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13366 to 10816. [2022-03-15 21:27:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10816 states, 10815 states have (on average 2.5967637540453072) internal successors, (28084), 10815 states have internal predecessors, (28084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10816 states to 10816 states and 28084 transitions. [2022-03-15 21:27:37,852 INFO L78 Accepts]: Start accepts. Automaton has 10816 states and 28084 transitions. Word has length 33 [2022-03-15 21:27:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:37,852 INFO L470 AbstractCegarLoop]: Abstraction has 10816 states and 28084 transitions. [2022-03-15 21:27:37,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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 21:27:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 10816 states and 28084 transitions. [2022-03-15 21:27:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:37,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:37,862 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:37,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:38,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:38,075 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1008085443, now seen corresponding path program 471 times [2022-03-15 21:27:38,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:38,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357325515] [2022-03-15 21:27:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:38,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 54 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:38,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:38,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357325515] [2022-03-15 21:27:38,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357325515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:38,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350193889] [2022-03-15 21:27:38,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:38,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:38,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:38,210 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:38,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-03-15 21:27:38,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:27:38,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:38,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:27:38,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-15 21:27:38,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-15 21:27:38,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350193889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:38,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:38,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 4] total 37 [2022-03-15 21:27:38,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [35879166] [2022-03-15 21:27:38,721 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:38,723 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:38,731 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 51 transitions. [2022-03-15 21:27:38,731 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:38,882 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [8118257#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8118262#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8118256#(< i2 (* 2 N)), 8118259#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8118261#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8118258#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8118260#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:27:38,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:27:38,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:38,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:27:38,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1698, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:27:38,883 INFO L87 Difference]: Start difference. First operand 10816 states and 28084 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:39,336 INFO L93 Difference]: Finished difference Result 13470 states and 33205 transitions. [2022-03-15 21:27:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:27:39,336 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:39,357 INFO L225 Difference]: With dead ends: 13470 [2022-03-15 21:27:39,357 INFO L226 Difference]: Without dead ends: 13463 [2022-03-15 21:27:39,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1042, Invalid=4070, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:27:39,358 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 206 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:39,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13463 states. [2022-03-15 21:27:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13463 to 10726. [2022-03-15 21:27:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10726 states, 10725 states have (on average 2.5905827505827506) internal successors, (27784), 10725 states have internal predecessors, (27784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10726 states to 10726 states and 27784 transitions. [2022-03-15 21:27:39,526 INFO L78 Accepts]: Start accepts. Automaton has 10726 states and 27784 transitions. Word has length 33 [2022-03-15 21:27:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:39,526 INFO L470 AbstractCegarLoop]: Abstraction has 10726 states and 27784 transitions. [2022-03-15 21:27:39,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 10726 states and 27784 transitions. [2022-03-15 21:27:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:39,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:39,537 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:39,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Ended with exit code 0 [2022-03-15 21:27:39,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:39,753 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:39,753 INFO L85 PathProgramCache]: Analyzing trace with hash -838957081, now seen corresponding path program 472 times [2022-03-15 21:27:39,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:39,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138505445] [2022-03-15 21:27:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:39,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:39,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:39,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138505445] [2022-03-15 21:27:39,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138505445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:39,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905018011] [2022-03-15 21:27:39,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:39,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:39,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:39,855 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:39,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-03-15 21:27:39,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:39,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:39,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:40,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905018011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:40,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:40,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 36 [2022-03-15 21:27:40,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1407259834] [2022-03-15 21:27:40,207 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:40,209 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:40,216 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:27:40,217 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:40,334 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [8153468#(< i2 (* 2 N)), 8153473#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8153471#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8153470#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8153472#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8153469#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:27:40,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:27:40,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:27:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1167, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:27:40,335 INFO L87 Difference]: Start difference. First operand 10726 states and 27784 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:40,705 INFO L93 Difference]: Finished difference Result 13450 states and 33059 transitions. [2022-03-15 21:27:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:27:40,705 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:40,727 INFO L225 Difference]: With dead ends: 13450 [2022-03-15 21:27:40,727 INFO L226 Difference]: Without dead ends: 13444 [2022-03-15 21:27:40,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1657, Invalid=3313, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:27:40,728 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 216 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:40,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13444 states. [2022-03-15 21:27:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13444 to 10633. [2022-03-15 21:27:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10633 states, 10632 states have (on average 2.5848382242287435) internal successors, (27482), 10632 states have internal predecessors, (27482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10633 states to 10633 states and 27482 transitions. [2022-03-15 21:27:40,923 INFO L78 Accepts]: Start accepts. Automaton has 10633 states and 27482 transitions. Word has length 33 [2022-03-15 21:27:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:40,923 INFO L470 AbstractCegarLoop]: Abstraction has 10633 states and 27482 transitions. [2022-03-15 21:27:40,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 10633 states and 27482 transitions. [2022-03-15 21:27:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:40,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:40,934 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:40,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:41,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-03-15 21:27:41,151 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:41,151 INFO L85 PathProgramCache]: Analyzing trace with hash 71292227, now seen corresponding path program 473 times [2022-03-15 21:27:41,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:41,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212392346] [2022-03-15 21:27:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:41,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:41,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:41,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212392346] [2022-03-15 21:27:41,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212392346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:41,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831194340] [2022-03-15 21:27:41,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:41,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:41,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:41,252 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:41,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-03-15 21:27:41,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:27:41,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:41,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:41,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:41,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831194340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:41,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:41,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22] total 34 [2022-03-15 21:27:41,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [382423361] [2022-03-15 21:27:41,497 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:41,499 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:41,507 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 47 transitions. [2022-03-15 21:27:41,507 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:41,565 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [8188474#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8188477#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8188476#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8188475#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8188473#(< i2 (* 2 N))] [2022-03-15 21:27:41,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:27:41,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:27:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=990, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:41,566 INFO L87 Difference]: Start difference. First operand 10633 states and 27482 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:41,858 INFO L93 Difference]: Finished difference Result 13306 states and 32637 transitions. [2022-03-15 21:27:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:27:41,859 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:41,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:41,880 INFO L225 Difference]: With dead ends: 13306 [2022-03-15 21:27:41,880 INFO L226 Difference]: Without dead ends: 13301 [2022-03-15 21:27:41,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1566, Invalid=3126, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:27:41,881 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 141 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:41,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13301 states. [2022-03-15 21:27:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13301 to 10537. [2022-03-15 21:27:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10537 states, 10536 states have (on average 2.57953682611997) internal successors, (27178), 10536 states have internal predecessors, (27178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10537 states to 10537 states and 27178 transitions. [2022-03-15 21:27:42,058 INFO L78 Accepts]: Start accepts. Automaton has 10537 states and 27178 transitions. Word has length 33 [2022-03-15 21:27:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:42,058 INFO L470 AbstractCegarLoop]: Abstraction has 10537 states and 27178 transitions. [2022-03-15 21:27:42,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 10537 states and 27178 transitions. [2022-03-15 21:27:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:42,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:42,071 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:42,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:42,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2022-03-15 21:27:42,291 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -869176217, now seen corresponding path program 474 times [2022-03-15 21:27:42,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:42,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557897982] [2022-03-15 21:27:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:42,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:42,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:42,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557897982] [2022-03-15 21:27:42,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557897982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:42,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159221786] [2022-03-15 21:27:42,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:42,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:42,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:42,382 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:42,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-03-15 21:27:42,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:27:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:42,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:42,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159221786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:42,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:42,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 23] total 35 [2022-03-15 21:27:42,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1266842583] [2022-03-15 21:27:42,729 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:42,731 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:42,739 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:27:42,739 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:42,811 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [8223145#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8223147#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8223144#(< i2 (* 2 N)), 8223146#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N)))] [2022-03-15 21:27:42,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:27:42,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:27:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=962, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:27:42,811 INFO L87 Difference]: Start difference. First operand 10537 states and 27178 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) 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 21:27:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:43,211 INFO L93 Difference]: Finished difference Result 13044 states and 31947 transitions. [2022-03-15 21:27:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:27:43,211 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) 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 33 [2022-03-15 21:27:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:43,234 INFO L225 Difference]: With dead ends: 13044 [2022-03-15 21:27:43,234 INFO L226 Difference]: Without dead ends: 13040 [2022-03-15 21:27:43,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1633, Invalid=3197, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:27:43,235 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 147 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:43,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13040 states. [2022-03-15 21:27:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13040 to 10537. [2022-03-15 21:27:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10537 states, 10536 states have (on average 2.5789673500379653) internal successors, (27172), 10536 states have internal predecessors, (27172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10537 states to 10537 states and 27172 transitions. [2022-03-15 21:27:43,454 INFO L78 Accepts]: Start accepts. Automaton has 10537 states and 27172 transitions. Word has length 33 [2022-03-15 21:27:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:43,454 INFO L470 AbstractCegarLoop]: Abstraction has 10537 states and 27172 transitions. [2022-03-15 21:27:43,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) 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 21:27:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10537 states and 27172 transitions. [2022-03-15 21:27:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:43,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:43,465 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:43,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:43,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2022-03-15 21:27:43,681 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1176608573, now seen corresponding path program 475 times [2022-03-15 21:27:43,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:43,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033313898] [2022-03-15 21:27:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:43,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:43,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:43,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033313898] [2022-03-15 21:27:43,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033313898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:43,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657880730] [2022-03-15 21:27:43,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:27:43,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:43,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:43,786 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:43,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-03-15 21:27:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:43,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:44,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657880730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:44,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:44,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 21] total 33 [2022-03-15 21:27:44,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1664284762] [2022-03-15 21:27:44,136 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:44,138 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:44,146 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2022-03-15 21:27:44,147 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:44,196 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [8257552#(< i2 (* 2 N)), 8257554#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8257553#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:27:44,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:27:44,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:44,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:27:44,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=801, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:27:44,197 INFO L87 Difference]: Start difference. First operand 10537 states and 27172 transitions. Second operand has 20 states, 20 states have (on average 2.0) 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 21:27:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:44,620 INFO L93 Difference]: Finished difference Result 12800 states and 31417 transitions. [2022-03-15 21:27:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 21:27:44,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) 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 33 [2022-03-15 21:27:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:44,641 INFO L225 Difference]: With dead ends: 12800 [2022-03-15 21:27:44,641 INFO L226 Difference]: Without dead ends: 12797 [2022-03-15 21:27:44,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:27:44,641 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 89 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:44,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:27:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12797 states. [2022-03-15 21:27:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12797 to 10537. [2022-03-15 21:27:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10537 states, 10536 states have (on average 2.5786826119969626) internal successors, (27169), 10536 states have internal predecessors, (27169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10537 states to 10537 states and 27169 transitions. [2022-03-15 21:27:44,816 INFO L78 Accepts]: Start accepts. Automaton has 10537 states and 27169 transitions. Word has length 33 [2022-03-15 21:27:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:44,817 INFO L470 AbstractCegarLoop]: Abstraction has 10537 states and 27169 transitions. [2022-03-15 21:27:44,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) 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 21:27:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10537 states and 27169 transitions. [2022-03-15 21:27:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:44,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:44,827 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:44,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:45,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-03-15 21:27:45,043 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:45,043 INFO L85 PathProgramCache]: Analyzing trace with hash -355241753, now seen corresponding path program 476 times [2022-03-15 21:27:45,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:45,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198322412] [2022-03-15 21:27:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:45,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:45,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198322412] [2022-03-15 21:27:45,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198322412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:45,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211331740] [2022-03-15 21:27:45,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:27:45,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:45,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:45,130 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:45,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-03-15 21:27:45,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:27:45,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:45,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:45,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:45,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211331740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:45,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:45,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 22] total 34 [2022-03-15 21:27:45,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1324783400] [2022-03-15 21:27:45,525 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:45,527 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:45,534 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:27:45,534 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:45,570 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [8291718#(< i2 (* 2 N)), 8291719#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:27:45,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:27:45,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:27:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=773, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:27:45,571 INFO L87 Difference]: Start difference. First operand 10537 states and 27169 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:27:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:45,979 INFO L93 Difference]: Finished difference Result 12669 states and 31225 transitions. [2022-03-15 21:27:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:27:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:27:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:46,000 INFO L225 Difference]: With dead ends: 12669 [2022-03-15 21:27:46,000 INFO L226 Difference]: Without dead ends: 12667 [2022-03-15 21:27:46,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1593, Invalid=3099, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:27:46,001 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 98 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:46,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12667 states. [2022-03-15 21:27:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12667 to 10642. [2022-03-15 21:27:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10642 states, 10641 states have (on average 2.583121887040692) internal successors, (27487), 10641 states have internal predecessors, (27487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10642 states to 10642 states and 27487 transitions. [2022-03-15 21:27:46,171 INFO L78 Accepts]: Start accepts. Automaton has 10642 states and 27487 transitions. Word has length 33 [2022-03-15 21:27:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:46,171 INFO L470 AbstractCegarLoop]: Abstraction has 10642 states and 27487 transitions. [2022-03-15 21:27:46,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:27:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 10642 states and 27487 transitions. [2022-03-15 21:27:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:46,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:46,233 INFO L514 BasicCegarLoop]: trace histogram [14, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:46,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:46,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2022-03-15 21:27:46,433 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash -708530525, now seen corresponding path program 477 times [2022-03-15 21:27:46,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:46,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112330943] [2022-03-15 21:27:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 92 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:46,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:46,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112330943] [2022-03-15 21:27:46,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112330943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:46,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294954589] [2022-03-15 21:27:46,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:27:46,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:46,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:46,633 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:46,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-03-15 21:27:46,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:27:46,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:46,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:46,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 92 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:46,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 92 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:47,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294954589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:47,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:47,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 41 [2022-03-15 21:27:47,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1355089560] [2022-03-15 21:27:47,008 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:47,010 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:47,020 INFO L252 McrAutomatonBuilder]: Finished intersection with 62 states and 89 transitions. [2022-03-15 21:27:47,020 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:47,722 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 26 new interpolants: [8325989#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 8325972#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 8325991#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 8325990#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 8325996#(or (<= (* 2 N) (+ i2 12)) (< (+ i2 13) (* 2 N))), 8325974#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 8325979#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 8325975#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 8325985#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 8325982#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 8325978#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 8325993#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 8325994#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 8325986#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 7 i2))), 8325977#(< i1 (* 2 N)), 8325995#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11))), 8325973#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 8325992#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 8325981#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 8325988#(or (<= (* 2 N) (+ 9 i2)) (< i1 (* 2 N))), 8325976#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 8325987#(or (< i1 (* 2 N)) (<= (* 2 N) (+ i2 8))), 8325980#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 8325971#(< i2 (* 2 N)), 8325983#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 8325984#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:27:47,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-15 21:27:47,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-15 21:27:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=3646, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:27:47,723 INFO L87 Difference]: Start difference. First operand 10642 states and 27487 transitions. Second operand has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 51 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 21:27:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:56,351 INFO L93 Difference]: Finished difference Result 18953 states and 43849 transitions. [2022-03-15 21:27:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2022-03-15 21:27:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 51 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) Word has length 33 [2022-03-15 21:27:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:56,382 INFO L225 Difference]: With dead ends: 18953 [2022-03-15 21:27:56,382 INFO L226 Difference]: Without dead ends: 17805 [2022-03-15 21:27:56,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42322 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=16268, Invalid=94954, Unknown=0, NotChecked=0, Total=111222 [2022-03-15 21:27:56,386 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 873 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 1594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1594 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:56,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 1 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1594 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:27:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17805 states. [2022-03-15 21:27:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17805 to 9290. [2022-03-15 21:27:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9290 states, 9289 states have (on average 2.486812358703843) internal successors, (23100), 9289 states have internal predecessors, (23100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9290 states to 9290 states and 23100 transitions. [2022-03-15 21:27:56,573 INFO L78 Accepts]: Start accepts. Automaton has 9290 states and 23100 transitions. Word has length 33 [2022-03-15 21:27:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:56,573 INFO L470 AbstractCegarLoop]: Abstraction has 9290 states and 23100 transitions. [2022-03-15 21:27:56,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 51 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 21:27:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 9290 states and 23100 transitions. [2022-03-15 21:27:56,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:56,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:56,583 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:56,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Ended with exit code 0 [2022-03-15 21:27:56,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2022-03-15 21:27:56,787 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:56,787 INFO L85 PathProgramCache]: Analyzing trace with hash -190198717, now seen corresponding path program 478 times [2022-03-15 21:27:56,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:56,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085987767] [2022-03-15 21:27:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:56,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:56,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:56,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085987767] [2022-03-15 21:27:56,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085987767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:56,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553946397] [2022-03-15 21:27:56,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:27:56,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:56,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:56,888 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:56,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-03-15 21:27:56,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:27:56,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:56,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:56,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:56,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:57,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553946397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:57,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:57,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:27:57,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1203317219] [2022-03-15 21:27:57,158 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:57,160 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:57,167 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2022-03-15 21:27:57,168 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:57,177 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8364289#(< i2 (* 2 N))] [2022-03-15 21:27:57,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:27:57,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:27:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:27:57,178 INFO L87 Difference]: Start difference. First operand 9290 states and 23100 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:57,513 INFO L93 Difference]: Finished difference Result 11481 states and 27344 transitions. [2022-03-15 21:27:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:27:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:27:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:57,530 INFO L225 Difference]: With dead ends: 11481 [2022-03-15 21:27:57,530 INFO L226 Difference]: Without dead ends: 11479 [2022-03-15 21:27:57,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1628, Invalid=3202, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:27:57,531 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 126 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:57,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 1 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11479 states. [2022-03-15 21:27:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11479 to 9287. [2022-03-15 21:27:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9287 states, 9286 states have (on average 2.4861081197501615) internal successors, (23086), 9286 states have internal predecessors, (23086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9287 states to 9287 states and 23086 transitions. [2022-03-15 21:27:57,684 INFO L78 Accepts]: Start accepts. Automaton has 9287 states and 23086 transitions. Word has length 33 [2022-03-15 21:27:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:57,684 INFO L470 AbstractCegarLoop]: Abstraction has 9287 states and 23086 transitions. [2022-03-15 21:27:57,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 9287 states and 23086 transitions. [2022-03-15 21:27:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:57,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:57,696 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:57,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:57,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:57,911 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash -688900057, now seen corresponding path program 479 times [2022-03-15 21:27:57,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:57,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967479625] [2022-03-15 21:27:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:57,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:57,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967479625] [2022-03-15 21:27:57,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967479625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:57,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055292654] [2022-03-15 21:27:57,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:27:57,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:57,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:57,989 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:57,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-03-15 21:27:58,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:27:58,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:58,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:58,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:58,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055292654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:58,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:58,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:27:58,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1200511631] [2022-03-15 21:27:58,293 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:58,295 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:58,302 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2022-03-15 21:27:58,302 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:58,342 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8394641#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:27:58,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:27:58,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:27:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:27:58,343 INFO L87 Difference]: Start difference. First operand 9287 states and 23086 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) 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 21:27:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:58,624 INFO L93 Difference]: Finished difference Result 12179 states and 28664 transitions. [2022-03-15 21:27:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:27:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 33 [2022-03-15 21:27:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:58,644 INFO L225 Difference]: With dead ends: 12179 [2022-03-15 21:27:58,644 INFO L226 Difference]: Without dead ends: 12179 [2022-03-15 21:27:58,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1330, Invalid=2576, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:27:58,653 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 173 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:58,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12179 states. [2022-03-15 21:27:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12179 to 9288. [2022-03-15 21:27:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9288 states, 9287 states have (on average 2.4861634542909443) internal successors, (23089), 9287 states have internal predecessors, (23089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:27:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9288 states to 9288 states and 23089 transitions. [2022-03-15 21:27:58,816 INFO L78 Accepts]: Start accepts. Automaton has 9288 states and 23089 transitions. Word has length 33 [2022-03-15 21:27:58,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:27:58,816 INFO L470 AbstractCegarLoop]: Abstraction has 9288 states and 23089 transitions. [2022-03-15 21:27:58,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) 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 21:27:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9288 states and 23089 transitions. [2022-03-15 21:27:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:27:58,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:27:58,826 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:27:58,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Forceful destruction successful, exit code 0 [2022-03-15 21:27:59,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:59,039 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:27:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:27:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1544206711, now seen corresponding path program 480 times [2022-03-15 21:27:59,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:27:59,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850212450] [2022-03-15 21:27:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:27:59,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:27:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:27:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:59,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:27:59,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850212450] [2022-03-15 21:27:59,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850212450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:27:59,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27868909] [2022-03-15 21:27:59,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:27:59,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:27:59,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:27:59,113 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:27:59,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-03-15 21:27:59,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:27:59,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:27:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:27:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:27:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:27:59,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:27:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:27:59,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27868909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:27:59,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:27:59,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 23] total 36 [2022-03-15 21:27:59,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2034606368] [2022-03-15 21:27:59,424 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:27:59,426 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:27:59,433 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2022-03-15 21:27:59,433 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:27:59,525 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [8425678#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8425679#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:27:59,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:27:59,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:27:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:27:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=911, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:27:59,526 INFO L87 Difference]: Start difference. First operand 9288 states and 23089 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:27:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:27:59,961 INFO L93 Difference]: Finished difference Result 12712 states and 29702 transitions. [2022-03-15 21:27:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:27:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 33 [2022-03-15 21:27:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:27:59,984 INFO L225 Difference]: With dead ends: 12712 [2022-03-15 21:27:59,984 INFO L226 Difference]: Without dead ends: 12712 [2022-03-15 21:27:59,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1786, Invalid=3914, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:27:59,985 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 206 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:27:59,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:27:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12712 states. [2022-03-15 21:28:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12712 to 9290. [2022-03-15 21:28:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9290 states, 9289 states have (on average 2.4862740876305307) internal successors, (23095), 9289 states have internal predecessors, (23095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9290 states to 9290 states and 23095 transitions. [2022-03-15 21:28:00,149 INFO L78 Accepts]: Start accepts. Automaton has 9290 states and 23095 transitions. Word has length 33 [2022-03-15 21:28:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:00,149 INFO L470 AbstractCegarLoop]: Abstraction has 9290 states and 23095 transitions. [2022-03-15 21:28:00,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21:28:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9290 states and 23095 transitions. [2022-03-15 21:28:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:00,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:00,159 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:00,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Ended with exit code 0 [2022-03-15 21:28:00,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:00,362 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2006058087, now seen corresponding path program 481 times [2022-03-15 21:28:00,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:00,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369258750] [2022-03-15 21:28:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:00,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:00,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:00,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369258750] [2022-03-15 21:28:00,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369258750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:00,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091463476] [2022-03-15 21:28:00,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:00,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:00,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:00,485 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:00,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-03-15 21:28:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:00,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:00,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:00,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091463476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:00,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:00,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:28:00,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [956513696] [2022-03-15 21:28:00,787 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:00,789 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:00,797 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2022-03-15 21:28:00,797 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:00,874 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [8457275#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8457276#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 8457277#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:28:00,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:28:00,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:28:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:28:00,875 INFO L87 Difference]: Start difference. First operand 9290 states and 23095 transitions. Second operand has 22 states, 22 states have (on average 2.0) 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 21:28:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:01,393 INFO L93 Difference]: Finished difference Result 13034 states and 30271 transitions. [2022-03-15 21:28:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 21:28:01,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) 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 33 [2022-03-15 21:28:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:01,414 INFO L225 Difference]: With dead ends: 13034 [2022-03-15 21:28:01,414 INFO L226 Difference]: Without dead ends: 13034 [2022-03-15 21:28:01,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2339, Invalid=5851, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 21:28:01,415 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 227 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:01,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13034 states. [2022-03-15 21:28:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13034 to 9292. [2022-03-15 21:28:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 9291 states have (on average 2.486384673339791) internal successors, (23101), 9291 states have internal predecessors, (23101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 23101 transitions. [2022-03-15 21:28:01,601 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 23101 transitions. Word has length 33 [2022-03-15 21:28:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:01,601 INFO L470 AbstractCegarLoop]: Abstraction has 9292 states and 23101 transitions. [2022-03-15 21:28:01,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) 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 21:28:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 23101 transitions. [2022-03-15 21:28:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:01,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:01,611 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:01,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:01,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2022-03-15 21:28:01,827 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash 395117129, now seen corresponding path program 482 times [2022-03-15 21:28:01,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:01,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104079267] [2022-03-15 21:28:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:01,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:01,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:01,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104079267] [2022-03-15 21:28:01,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104079267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:01,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661156553] [2022-03-15 21:28:01,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:01,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:01,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:01,954 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:01,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-03-15 21:28:01,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:01,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:01,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:01,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:02,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:02,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661156553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:02,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:02,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 37 [2022-03-15 21:28:02,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1761895922] [2022-03-15 21:28:02,362 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:02,364 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:02,372 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 53 transitions. [2022-03-15 21:28:02,373 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:02,490 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [8489230#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 8489231#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 8489228#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8489229#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:28:02,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:28:02,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:28:02,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:28:02,491 INFO L87 Difference]: Start difference. First operand 9292 states and 23101 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) 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 21:28:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:03,100 INFO L93 Difference]: Finished difference Result 13141 states and 30393 transitions. [2022-03-15 21:28:03,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 21:28:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 33 [2022-03-15 21:28:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:03,122 INFO L225 Difference]: With dead ends: 13141 [2022-03-15 21:28:03,122 INFO L226 Difference]: Without dead ends: 13141 [2022-03-15 21:28:03,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2731, Invalid=6775, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 21:28:03,123 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 256 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:03,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13141 states. [2022-03-15 21:28:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13141 to 9294. [2022-03-15 21:28:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 9293 states have (on average 2.486495211449478) internal successors, (23107), 9293 states have internal predecessors, (23107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 23107 transitions. [2022-03-15 21:28:03,275 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 23107 transitions. Word has length 33 [2022-03-15 21:28:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:03,275 INFO L470 AbstractCegarLoop]: Abstraction has 9294 states and 23107 transitions. [2022-03-15 21:28:03,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) 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 21:28:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 23107 transitions. [2022-03-15 21:28:03,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:03,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:03,285 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:03,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Ended with exit code 0 [2022-03-15 21:28:03,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:03,499 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1995554983, now seen corresponding path program 483 times [2022-03-15 21:28:03,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:03,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231991316] [2022-03-15 21:28:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:03,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:03,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:03,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231991316] [2022-03-15 21:28:03,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231991316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:03,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547364435] [2022-03-15 21:28:03,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:03,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:03,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:03,642 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:03,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-03-15 21:28:03,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:28:03,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:03,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:03,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547364435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:03,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:03,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:28:03,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1730482006] [2022-03-15 21:28:03,978 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:03,980 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:03,988 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 57 transitions. [2022-03-15 21:28:03,988 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:04,106 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [8521306#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 8521303#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8521305#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 8521307#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 8521304#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:28:04,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:28:04,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:28:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:28:04,107 INFO L87 Difference]: Start difference. First operand 9294 states and 23107 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) 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 21:28:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:04,954 INFO L93 Difference]: Finished difference Result 13128 states and 30280 transitions. [2022-03-15 21:28:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 21:28:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 33 [2022-03-15 21:28:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:04,974 INFO L225 Difference]: With dead ends: 13128 [2022-03-15 21:28:04,974 INFO L226 Difference]: Without dead ends: 13128 [2022-03-15 21:28:04,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4754 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3519, Invalid=9591, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 21:28:04,975 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 257 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:04,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2022-03-15 21:28:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 9296. [2022-03-15 21:28:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9296 states, 9295 states have (on average 2.4866057019903174) internal successors, (23113), 9295 states have internal predecessors, (23113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9296 states to 9296 states and 23113 transitions. [2022-03-15 21:28:05,119 INFO L78 Accepts]: Start accepts. Automaton has 9296 states and 23113 transitions. Word has length 33 [2022-03-15 21:28:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:05,119 INFO L470 AbstractCegarLoop]: Abstraction has 9296 states and 23113 transitions. [2022-03-15 21:28:05,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) 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 21:28:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 9296 states and 23113 transitions. [2022-03-15 21:28:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:05,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:05,129 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:05,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:05,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:05,342 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:05,342 INFO L85 PathProgramCache]: Analyzing trace with hash 69520905, now seen corresponding path program 484 times [2022-03-15 21:28:05,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:05,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306665454] [2022-03-15 21:28:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:05,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:05,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:05,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306665454] [2022-03-15 21:28:05,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306665454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:05,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941389404] [2022-03-15 21:28:05,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:05,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:05,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:05,439 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:05,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-03-15 21:28:05,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:05,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:05,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:05,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:05,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941389404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:05,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:05,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 25] total 38 [2022-03-15 21:28:05,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1812606181] [2022-03-15 21:28:05,722 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:05,724 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:05,733 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 61 transitions. [2022-03-15 21:28:05,733 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:05,873 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [8553406#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 8553408#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 8553403#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8553405#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 8553407#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 8553404#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:28:05,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:28:05,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:28:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:28:05,874 INFO L87 Difference]: Start difference. First operand 9296 states and 23113 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) 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 21:28:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:06,774 INFO L93 Difference]: Finished difference Result 12900 states and 29747 transitions. [2022-03-15 21:28:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 21:28:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 33 [2022-03-15 21:28:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:06,799 INFO L225 Difference]: With dead ends: 12900 [2022-03-15 21:28:06,799 INFO L226 Difference]: Without dead ends: 12900 [2022-03-15 21:28:06,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4857 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3775, Invalid=10031, Unknown=0, NotChecked=0, Total=13806 [2022-03-15 21:28:06,801 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 281 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:06,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 1 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12900 states. [2022-03-15 21:28:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12900 to 9298. [2022-03-15 21:28:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9298 states, 9297 states have (on average 2.4867161449930086) internal successors, (23119), 9297 states have internal predecessors, (23119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9298 states to 9298 states and 23119 transitions. [2022-03-15 21:28:06,988 INFO L78 Accepts]: Start accepts. Automaton has 9298 states and 23119 transitions. Word has length 33 [2022-03-15 21:28:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:06,988 INFO L470 AbstractCegarLoop]: Abstraction has 9298 states and 23119 transitions. [2022-03-15 21:28:06,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) 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 21:28:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9298 states and 23119 transitions. [2022-03-15 21:28:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:07,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:07,001 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:07,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:07,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-03-15 21:28:07,223 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:07,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash 492006631, now seen corresponding path program 485 times [2022-03-15 21:28:07,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:07,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240192060] [2022-03-15 21:28:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:07,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:07,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:07,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240192060] [2022-03-15 21:28:07,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240192060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:07,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558002051] [2022-03-15 21:28:07,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:07,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:07,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:07,330 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:07,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-03-15 21:28:07,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:28:07,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:07,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:07,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:07,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:07,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558002051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:07,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:07,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 25] total 38 [2022-03-15 21:28:07,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [747204895] [2022-03-15 21:28:07,625 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:07,627 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:07,636 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 65 transitions. [2022-03-15 21:28:07,636 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:07,803 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [8585284#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 8585283#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 8585282#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8585286#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 8585287#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 8585288#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 8585285#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N)))] [2022-03-15 21:28:07,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:28:07,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:28:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:28:07,804 INFO L87 Difference]: Start difference. First operand 9298 states and 23119 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:28:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:08,964 INFO L93 Difference]: Finished difference Result 12680 states and 29306 transitions. [2022-03-15 21:28:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 21:28:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 33 [2022-03-15 21:28:08,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:08,986 INFO L225 Difference]: With dead ends: 12680 [2022-03-15 21:28:08,986 INFO L226 Difference]: Without dead ends: 12680 [2022-03-15 21:28:08,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6631 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4746, Invalid=13344, Unknown=0, NotChecked=0, Total=18090 [2022-03-15 21:28:08,989 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 315 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:08,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12680 states. [2022-03-15 21:28:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12680 to 9300. [2022-03-15 21:28:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9300 states, 9299 states have (on average 2.4868265404882246) internal successors, (23125), 9299 states have internal predecessors, (23125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9300 states to 9300 states and 23125 transitions. [2022-03-15 21:28:09,132 INFO L78 Accepts]: Start accepts. Automaton has 9300 states and 23125 transitions. Word has length 33 [2022-03-15 21:28:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:09,132 INFO L470 AbstractCegarLoop]: Abstraction has 9300 states and 23125 transitions. [2022-03-15 21:28:09,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 21:28:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9300 states and 23125 transitions. [2022-03-15 21:28:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:09,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:09,142 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:09,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Ended with exit code 0 [2022-03-15 21:28:09,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2022-03-15 21:28:09,351 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash 704162249, now seen corresponding path program 486 times [2022-03-15 21:28:09,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:09,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180729735] [2022-03-15 21:28:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:09,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:09,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:09,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180729735] [2022-03-15 21:28:09,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180729735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:09,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189010336] [2022-03-15 21:28:09,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:09,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:09,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:09,462 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:09,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-03-15 21:28:09,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:28:09,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:09,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:09,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:09,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189010336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:09,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:09,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 26] total 39 [2022-03-15 21:28:09,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2058768652] [2022-03-15 21:28:09,744 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:09,746 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:09,756 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 69 transitions. [2022-03-15 21:28:09,756 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:09,949 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [8616979#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8616986#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 8616980#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 8616983#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 8616984#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 8616982#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 8616981#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 8616985#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N)))] [2022-03-15 21:28:09,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:28:09,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:28:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=1688, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:09,949 INFO L87 Difference]: Start difference. First operand 9300 states and 23125 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:11,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:11,180 INFO L93 Difference]: Finished difference Result 12149 states and 28260 transitions. [2022-03-15 21:28:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 21:28:11,180 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:11,199 INFO L225 Difference]: With dead ends: 12149 [2022-03-15 21:28:11,199 INFO L226 Difference]: Without dead ends: 12149 [2022-03-15 21:28:11,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4712, Invalid=13110, Unknown=0, NotChecked=0, Total=17822 [2022-03-15 21:28:11,201 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 290 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:11,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12149 states. [2022-03-15 21:28:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12149 to 9302. [2022-03-15 21:28:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9302 states, 9301 states have (on average 2.4869368885066123) internal successors, (23131), 9301 states have internal predecessors, (23131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9302 states to 9302 states and 23131 transitions. [2022-03-15 21:28:11,372 INFO L78 Accepts]: Start accepts. Automaton has 9302 states and 23131 transitions. Word has length 33 [2022-03-15 21:28:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:11,372 INFO L470 AbstractCegarLoop]: Abstraction has 9302 states and 23131 transitions. [2022-03-15 21:28:11,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 9302 states and 23131 transitions. [2022-03-15 21:28:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:11,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:11,382 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:11,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:11,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-03-15 21:28:11,598 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1308948185, now seen corresponding path program 487 times [2022-03-15 21:28:11,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:11,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817087058] [2022-03-15 21:28:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:11,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:11,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:11,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817087058] [2022-03-15 21:28:11,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817087058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:11,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140858801] [2022-03-15 21:28:11,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:11,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:11,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:11,713 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:11,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-03-15 21:28:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:11,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:11,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140858801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:11,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:11,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 26] total 39 [2022-03-15 21:28:11,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1376801904] [2022-03-15 21:28:11,992 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:11,994 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:12,003 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 73 transitions. [2022-03-15 21:28:12,004 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:12,220 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [8648144#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8648149#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 8648146#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 8648147#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 8648145#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 8648148#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 8648151#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 8648150#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 8648152#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8)))] [2022-03-15 21:28:12,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:28:12,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:12,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:28:12,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1791, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:28:12,221 INFO L87 Difference]: Start difference. First operand 9302 states and 23131 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:13,797 INFO L93 Difference]: Finished difference Result 11778 states and 27689 transitions. [2022-03-15 21:28:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 21:28:13,797 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:13,816 INFO L225 Difference]: With dead ends: 11778 [2022-03-15 21:28:13,816 INFO L226 Difference]: Without dead ends: 11778 [2022-03-15 21:28:13,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5837, Invalid=16813, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 21:28:13,819 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 303 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:13,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 1 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:28:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11778 states. [2022-03-15 21:28:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11778 to 9164. [2022-03-15 21:28:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9164 states, 9163 states have (on average 2.498635817963549) internal successors, (22895), 9163 states have internal predecessors, (22895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9164 states to 9164 states and 22895 transitions. [2022-03-15 21:28:13,969 INFO L78 Accepts]: Start accepts. Automaton has 9164 states and 22895 transitions. Word has length 33 [2022-03-15 21:28:13,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:13,970 INFO L470 AbstractCegarLoop]: Abstraction has 9164 states and 22895 transitions. [2022-03-15 21:28:13,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9164 states and 22895 transitions. [2022-03-15 21:28:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:13,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:13,980 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:13,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:14,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2022-03-15 21:28:14,193 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:14,193 INFO L85 PathProgramCache]: Analyzing trace with hash 709137801, now seen corresponding path program 488 times [2022-03-15 21:28:14,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:14,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476303567] [2022-03-15 21:28:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:14,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:14,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:14,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476303567] [2022-03-15 21:28:14,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476303567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:14,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907385089] [2022-03-15 21:28:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:14,316 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:14,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-03-15 21:28:14,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:14,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:14,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:14,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:14,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:14,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907385089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:14,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:14,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 27] total 40 [2022-03-15 21:28:14,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1879802807] [2022-03-15 21:28:14,583 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:14,585 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:14,627 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 77 transitions. [2022-03-15 21:28:14,627 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:14,936 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [8678704#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 8678705#(or (<= (* 2 N) (+ 9 i2)) (<= (+ i2 11) (* 2 N))), 8678703#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 8678701#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 8678696#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8678697#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 8678700#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 8678702#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 8678699#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 8678698#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2)))] [2022-03-15 21:28:14,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:28:14,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:14,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:28:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=1965, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:28:14,937 INFO L87 Difference]: Start difference. First operand 9164 states and 22895 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:16,784 INFO L93 Difference]: Finished difference Result 10707 states and 25714 transitions. [2022-03-15 21:28:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 21:28:16,784 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:16,801 INFO L225 Difference]: With dead ends: 10707 [2022-03-15 21:28:16,801 INFO L226 Difference]: Without dead ends: 10707 [2022-03-15 21:28:16,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5328, Invalid=15552, Unknown=0, NotChecked=0, Total=20880 [2022-03-15 21:28:16,803 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 259 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:16,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 1 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:28:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10707 states. [2022-03-15 21:28:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10707 to 9087. [2022-03-15 21:28:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9087 states, 9086 states have (on average 2.4936165529385868) internal successors, (22657), 9086 states have internal predecessors, (22657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9087 states to 9087 states and 22657 transitions. [2022-03-15 21:28:16,938 INFO L78 Accepts]: Start accepts. Automaton has 9087 states and 22657 transitions. Word has length 33 [2022-03-15 21:28:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:16,938 INFO L470 AbstractCegarLoop]: Abstraction has 9087 states and 22657 transitions. [2022-03-15 21:28:16,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9087 states and 22657 transitions. [2022-03-15 21:28:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:16,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:16,948 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:16,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:17,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:17,163 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1154706073, now seen corresponding path program 489 times [2022-03-15 21:28:17,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:17,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298538605] [2022-03-15 21:28:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:17,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:17,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:17,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298538605] [2022-03-15 21:28:17,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298538605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:17,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775985552] [2022-03-15 21:28:17,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:17,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:17,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:17,337 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:17,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-03-15 21:28:17,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:28:17,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:17,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:17,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775985552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:17,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:17,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 27] total 40 [2022-03-15 21:28:17,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2140844849] [2022-03-15 21:28:17,651 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:17,653 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:17,664 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 81 transitions. [2022-03-15 21:28:17,664 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:18,091 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [8708015#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 8708008#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 8708013#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 8708012#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 8708016#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 8708017#(or (<= (* 2 N) (+ 9 i2)) (<= (+ i2 11) (* 2 N))), 8708018#(or (<= (* 2 N) (+ i2 10)) (<= (+ i2 12) (* 2 N))), 8708010#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 8708011#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 8708009#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 8708014#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N)))] [2022-03-15 21:28:18,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 21:28:18,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:18,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 21:28:18,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:28:18,092 INFO L87 Difference]: Start difference. First operand 9087 states and 22657 transitions. Second operand has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:20,692 INFO L93 Difference]: Finished difference Result 11118 states and 26866 transitions. [2022-03-15 21:28:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-15 21:28:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:20,708 INFO L225 Difference]: With dead ends: 11118 [2022-03-15 21:28:20,708 INFO L226 Difference]: Without dead ends: 11118 [2022-03-15 21:28:20,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7641, Invalid=22115, Unknown=0, NotChecked=0, Total=29756 [2022-03-15 21:28:20,711 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 305 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:20,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:28:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2022-03-15 21:28:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 9111. [2022-03-15 21:28:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9110 states have (on average 2.4949506037321623) internal successors, (22729), 9110 states have internal predecessors, (22729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 22729 transitions. [2022-03-15 21:28:20,869 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 22729 transitions. Word has length 33 [2022-03-15 21:28:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:20,869 INFO L470 AbstractCegarLoop]: Abstraction has 9111 states and 22729 transitions. [2022-03-15 21:28:20,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 22729 transitions. [2022-03-15 21:28:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:20,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:20,882 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:20,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:21,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:21,096 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2895031, now seen corresponding path program 490 times [2022-03-15 21:28:21,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:21,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810728630] [2022-03-15 21:28:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:21,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:21,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:21,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810728630] [2022-03-15 21:28:21,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810728630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:21,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233563006] [2022-03-15 21:28:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:21,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:21,246 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:21,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-03-15 21:28:21,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:21,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:21,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:21,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233563006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:21,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:21,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 27] total 40 [2022-03-15 21:28:21,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1055309549] [2022-03-15 21:28:21,493 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:21,495 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:21,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:21,505 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:21,701 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [8737841#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 8737835#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8737836#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8737837#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8737838#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8737845#(or (<= (* 2 N) (+ i1 10)) (< i2 (* 2 N))), 8737844#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 9 i1))), 8737839#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8737840#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8737843#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 8))), 8737834#(< i2 (* 2 N)), 8737842#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1)))] [2022-03-15 21:28:21,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 21:28:21,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 21:28:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=810, Invalid=1946, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:28:21,702 INFO L87 Difference]: Start difference. First operand 9111 states and 22729 transitions. Second operand has 39 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 38 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:22,047 INFO L93 Difference]: Finished difference Result 10200 states and 24409 transitions. [2022-03-15 21:28:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:28:22,047 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 38 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:22,061 INFO L225 Difference]: With dead ends: 10200 [2022-03-15 21:28:22,061 INFO L226 Difference]: Without dead ends: 10188 [2022-03-15 21:28:22,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1858, Invalid=4148, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:28:22,062 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 330 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:22,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2022-03-15 21:28:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 9039. [2022-03-15 21:28:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9039 states, 9038 states have (on average 2.4874972339013057) internal successors, (22482), 9038 states have internal predecessors, (22482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9039 states to 9039 states and 22482 transitions. [2022-03-15 21:28:22,189 INFO L78 Accepts]: Start accepts. Automaton has 9039 states and 22482 transitions. Word has length 33 [2022-03-15 21:28:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:22,189 INFO L470 AbstractCegarLoop]: Abstraction has 9039 states and 22482 transitions. [2022-03-15 21:28:22,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 38 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 9039 states and 22482 transitions. [2022-03-15 21:28:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:22,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:22,198 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:22,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Ended with exit code 0 [2022-03-15 21:28:22,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:22,413 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash -882520445, now seen corresponding path program 491 times [2022-03-15 21:28:22,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:22,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70302972] [2022-03-15 21:28:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:22,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:22,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:22,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70302972] [2022-03-15 21:28:22,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70302972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:22,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289024640] [2022-03-15 21:28:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:22,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:22,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:22,529 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:22,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-03-15 21:28:22,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:28:22,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:22,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:22,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:22,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:22,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289024640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:22,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:22,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 39 [2022-03-15 21:28:22,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [222909971] [2022-03-15 21:28:22,838 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:22,840 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:22,848 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:22,849 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:23,040 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [8766406#(< i2 (* 2 N)), 8766411#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8766414#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 8766409#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8766415#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 8))), 8766413#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 8766412#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8766407#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8766408#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8766416#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 9 i1))), 8766410#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1)))] [2022-03-15 21:28:23,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 21:28:23,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 21:28:23,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=1781, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:28:23,041 INFO L87 Difference]: Start difference. First operand 9039 states and 22482 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:23,389 INFO L93 Difference]: Finished difference Result 10627 states and 25302 transitions. [2022-03-15 21:28:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:28:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:23,404 INFO L225 Difference]: With dead ends: 10627 [2022-03-15 21:28:23,405 INFO L226 Difference]: Without dead ends: 10616 [2022-03-15 21:28:23,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1846, Invalid=4006, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:28:23,405 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 271 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:23,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2022-03-15 21:28:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 8966. [2022-03-15 21:28:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8966 states, 8965 states have (on average 2.4800892359174567) internal successors, (22234), 8965 states have internal predecessors, (22234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 22234 transitions. [2022-03-15 21:28:23,535 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 22234 transitions. Word has length 33 [2022-03-15 21:28:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:23,535 INFO L470 AbstractCegarLoop]: Abstraction has 8966 states and 22234 transitions. [2022-03-15 21:28:23,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 22234 transitions. [2022-03-15 21:28:23,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:23,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:23,545 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:23,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Ended with exit code 0 [2022-03-15 21:28:23,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:23,748 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1603632119, now seen corresponding path program 492 times [2022-03-15 21:28:23,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:23,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92814980] [2022-03-15 21:28:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:23,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 61 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:23,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:23,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92814980] [2022-03-15 21:28:23,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92814980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:23,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313973091] [2022-03-15 21:28:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:23,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:23,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:23,931 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:23,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-03-15 21:28:23,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 21:28:23,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:23,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:23,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 61 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:24,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 61 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:24,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313973091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:24,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:24,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 26] total 39 [2022-03-15 21:28:24,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [944657504] [2022-03-15 21:28:24,279 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:24,281 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:24,290 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:24,290 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:24,538 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [8795266#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8795264#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8795260#(< i2 (* 2 N)), 8795267#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 8795269#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 8))), 8795263#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8795261#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8795262#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8795268#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 8795265#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4)))] [2022-03-15 21:28:24,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 21:28:24,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 21:28:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=1685, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:28:24,539 INFO L87 Difference]: Start difference. First operand 8966 states and 22234 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 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 21:28:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:25,006 INFO L93 Difference]: Finished difference Result 10973 states and 26018 transitions. [2022-03-15 21:28:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:28:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 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 33 [2022-03-15 21:28:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:25,023 INFO L225 Difference]: With dead ends: 10973 [2022-03-15 21:28:25,023 INFO L226 Difference]: Without dead ends: 10963 [2022-03-15 21:28:25,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1871, Invalid=3981, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:28:25,024 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 234 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:25,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2022-03-15 21:28:25,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 8891. [2022-03-15 21:28:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8891 states, 8890 states have (on average 2.4728908886389203) internal successors, (21984), 8890 states have internal predecessors, (21984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8891 states to 8891 states and 21984 transitions. [2022-03-15 21:28:25,163 INFO L78 Accepts]: Start accepts. Automaton has 8891 states and 21984 transitions. Word has length 33 [2022-03-15 21:28:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:25,163 INFO L470 AbstractCegarLoop]: Abstraction has 8891 states and 21984 transitions. [2022-03-15 21:28:25,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 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 21:28:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 8891 states and 21984 transitions. [2022-03-15 21:28:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:25,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:25,173 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:25,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:25,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:25,388 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:25,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash -657062461, now seen corresponding path program 493 times [2022-03-15 21:28:25,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:25,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523063208] [2022-03-15 21:28:25,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:25,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:25,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:25,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523063208] [2022-03-15 21:28:25,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523063208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:25,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306529662] [2022-03-15 21:28:25,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:25,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:25,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:25,550 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:25,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-03-15 21:28:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:25,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:25,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:25,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306529662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:25,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:25,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 38 [2022-03-15 21:28:25,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1016150652] [2022-03-15 21:28:25,882 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:25,884 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:25,892 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:25,893 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:26,118 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [8824311#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8824310#(< i2 (* 2 N)), 8824318#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 7 i1))), 8824316#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8824317#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1))), 8824313#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8824315#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8824314#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8824312#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N)))] [2022-03-15 21:28:26,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:28:26,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:26,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:28:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=1531, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:28:26,119 INFO L87 Difference]: Start difference. First operand 8891 states and 21984 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:26,602 INFO L93 Difference]: Finished difference Result 11209 states and 26486 transitions. [2022-03-15 21:28:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:28:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:26,619 INFO L225 Difference]: With dead ends: 11209 [2022-03-15 21:28:26,619 INFO L226 Difference]: Without dead ends: 11200 [2022-03-15 21:28:26,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1847, Invalid=3853, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:28:26,619 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 162 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:26,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11200 states. [2022-03-15 21:28:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11200 to 8815. [2022-03-15 21:28:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 2.465736328568187) internal successors, (21733), 8814 states have internal predecessors, (21733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 21733 transitions. [2022-03-15 21:28:26,746 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 21733 transitions. Word has length 33 [2022-03-15 21:28:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:26,746 INFO L470 AbstractCegarLoop]: Abstraction has 8815 states and 21733 transitions. [2022-03-15 21:28:26,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 21733 transitions. [2022-03-15 21:28:26,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:26,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:26,756 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:26,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:26,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:26,971 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash 343303369, now seen corresponding path program 494 times [2022-03-15 21:28:26,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:26,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008976053] [2022-03-15 21:28:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 51 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:27,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:27,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008976053] [2022-03-15 21:28:27,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008976053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:27,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515992772] [2022-03-15 21:28:27,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:27,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:27,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:27,122 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:27,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-03-15 21:28:27,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:27,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 51 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:27,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 51 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:27,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515992772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:27,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:27,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 25] total 38 [2022-03-15 21:28:27,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [636035470] [2022-03-15 21:28:27,468 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:27,470 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:27,479 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:27,479 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:27,618 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [8853446#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8853451#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1))), 8853448#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8853447#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8853445#(< i2 (* 2 N)), 8853449#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8853450#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8853452#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 6 i1)))] [2022-03-15 21:28:27,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:28:27,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:28:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=1441, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:28:27,619 INFO L87 Difference]: Start difference. First operand 8815 states and 21733 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:27,944 INFO L93 Difference]: Finished difference Result 11328 states and 26698 transitions. [2022-03-15 21:28:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:28:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:27,961 INFO L225 Difference]: With dead ends: 11328 [2022-03-15 21:28:27,961 INFO L226 Difference]: Without dead ends: 11320 [2022-03-15 21:28:27,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1866, Invalid=3834, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:28:27,962 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 276 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:27,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11320 states. [2022-03-15 21:28:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11320 to 8737. [2022-03-15 21:28:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8737 states, 8736 states have (on average 2.458791208791209) internal successors, (21480), 8736 states have internal predecessors, (21480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8737 states to 8737 states and 21480 transitions. [2022-03-15 21:28:28,108 INFO L78 Accepts]: Start accepts. Automaton has 8737 states and 21480 transitions. Word has length 33 [2022-03-15 21:28:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:28,108 INFO L470 AbstractCegarLoop]: Abstraction has 8737 states and 21480 transitions. [2022-03-15 21:28:28,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 8737 states and 21480 transitions. [2022-03-15 21:28:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:28,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:28,118 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:28,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:28,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2022-03-15 21:28:28,331 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash 929762563, now seen corresponding path program 495 times [2022-03-15 21:28:28,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:28,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167980015] [2022-03-15 21:28:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 49 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:28,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:28,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167980015] [2022-03-15 21:28:28,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167980015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:28,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657588004] [2022-03-15 21:28:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:28,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:28,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:28,419 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:28,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-03-15 21:28:28,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:28:28,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:28,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:28:28,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-15 21:28:28,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-15 21:28:28,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657588004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:28,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:28,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 4] total 38 [2022-03-15 21:28:28,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1787862400] [2022-03-15 21:28:28,763 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:28,765 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:28,774 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:28,774 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:28,932 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [8882549#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4))), 8882545#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8882548#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8882546#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8882547#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8882544#(< i2 (* 2 N)), 8882550#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 5 i1)))] [2022-03-15 21:28:28,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:28:28,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:28:28,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1769, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:28:28,933 INFO L87 Difference]: Start difference. First operand 8737 states and 21480 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:29,371 INFO L93 Difference]: Finished difference Result 11345 states and 26680 transitions. [2022-03-15 21:28:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 21:28:29,371 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:29,389 INFO L225 Difference]: With dead ends: 11345 [2022-03-15 21:28:29,389 INFO L226 Difference]: Without dead ends: 11338 [2022-03-15 21:28:29,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1191, Invalid=4509, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:28:29,390 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 318 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:29,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11338 states. [2022-03-15 21:28:29,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11338 to 8658. [2022-03-15 21:28:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8658 states, 8657 states have (on average 2.4518886450271458) internal successors, (21226), 8657 states have internal predecessors, (21226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8658 states to 8658 states and 21226 transitions. [2022-03-15 21:28:29,552 INFO L78 Accepts]: Start accepts. Automaton has 8658 states and 21226 transitions. Word has length 33 [2022-03-15 21:28:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:29,552 INFO L470 AbstractCegarLoop]: Abstraction has 8658 states and 21226 transitions. [2022-03-15 21:28:29,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 8658 states and 21226 transitions. [2022-03-15 21:28:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:29,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:29,562 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:29,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:29,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-03-15 21:28:29,777 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:29,778 INFO L85 PathProgramCache]: Analyzing trace with hash 394491273, now seen corresponding path program 496 times [2022-03-15 21:28:29,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:29,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691437127] [2022-03-15 21:28:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:29,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 49 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:29,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:29,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691437127] [2022-03-15 21:28:29,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691437127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:29,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413024546] [2022-03-15 21:28:29,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:29,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:29,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:29,887 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:29,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-03-15 21:28:29,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:29,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:29,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:29,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 49 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:29,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 49 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:30,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413024546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:30,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:30,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:28:30,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [895300066] [2022-03-15 21:28:30,200 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:30,202 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:30,211 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:30,212 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:30,339 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [8911504#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8911505#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8911502#(< i2 (* 2 N)), 8911503#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8911506#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8911507#(or (< i2 (* 2 N)) (<= (* 2 N) (+ i1 4)))] [2022-03-15 21:28:30,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:28:30,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:30,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:28:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:28:30,340 INFO L87 Difference]: Start difference. First operand 8658 states and 21226 transitions. Second operand has 27 states, 27 states have (on average 2.0) 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 21:28:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:30,739 INFO L93 Difference]: Finished difference Result 11257 states and 26428 transitions. [2022-03-15 21:28:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:28:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) 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 33 [2022-03-15 21:28:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:30,757 INFO L225 Difference]: With dead ends: 11257 [2022-03-15 21:28:30,758 INFO L226 Difference]: Without dead ends: 11251 [2022-03-15 21:28:30,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1844, Invalid=3706, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:28:30,759 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 180 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:30,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11251 states. [2022-03-15 21:28:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11251 to 8577. [2022-03-15 21:28:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8577 states, 8576 states have (on average 2.4451958955223883) internal successors, (20970), 8576 states have internal predecessors, (20970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8577 states to 8577 states and 20970 transitions. [2022-03-15 21:28:30,907 INFO L78 Accepts]: Start accepts. Automaton has 8577 states and 20970 transitions. Word has length 33 [2022-03-15 21:28:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:30,908 INFO L470 AbstractCegarLoop]: Abstraction has 8577 states and 20970 transitions. [2022-03-15 21:28:30,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) 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 21:28:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8577 states and 20970 transitions. [2022-03-15 21:28:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:30,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:30,918 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:30,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Ended with exit code 0 [2022-03-15 21:28:31,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2022-03-15 21:28:31,127 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:31,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1978080189, now seen corresponding path program 497 times [2022-03-15 21:28:31,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:31,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259566215] [2022-03-15 21:28:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:31,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 51 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:31,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:31,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259566215] [2022-03-15 21:28:31,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259566215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:31,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107986359] [2022-03-15 21:28:31,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:31,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:31,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:31,254 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:31,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-03-15 21:28:31,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-15 21:28:31,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:31,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 51 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:31,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 51 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:31,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107986359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:31,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:31,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 36 [2022-03-15 21:28:31,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [905359360] [2022-03-15 21:28:31,624 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:31,626 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:31,635 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:31,635 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:31,755 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [8940212#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8940214#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 3 i1))), 8940210#(< i2 (* 2 N)), 8940211#(or (< i2 (* 2 N)) (<= (* 2 N) i1)), 8940213#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1)))] [2022-03-15 21:28:31,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:28:31,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:31,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:28:31,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1082, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:28:31,756 INFO L87 Difference]: Start difference. First operand 8577 states and 20970 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:32,159 INFO L93 Difference]: Finished difference Result 11075 states and 25960 transitions. [2022-03-15 21:28:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:28:32,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:32,175 INFO L225 Difference]: With dead ends: 11075 [2022-03-15 21:28:32,175 INFO L226 Difference]: Without dead ends: 11070 [2022-03-15 21:28:32,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1798, Invalid=3604, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:28:32,176 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 197 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:32,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11070 states. [2022-03-15 21:28:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11070 to 8495. [2022-03-15 21:28:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8495 states, 8494 states have (on average 2.4385448551919002) internal successors, (20713), 8494 states have internal predecessors, (20713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8495 states to 8495 states and 20713 transitions. [2022-03-15 21:28:32,312 INFO L78 Accepts]: Start accepts. Automaton has 8495 states and 20713 transitions. Word has length 33 [2022-03-15 21:28:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:32,312 INFO L470 AbstractCegarLoop]: Abstraction has 8495 states and 20713 transitions. [2022-03-15 21:28:32,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8495 states and 20713 transitions. [2022-03-15 21:28:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:32,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:32,322 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:32,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:32,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:32,538 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -669141431, now seen corresponding path program 498 times [2022-03-15 21:28:32,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:32,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473131837] [2022-03-15 21:28:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:32,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:32,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:32,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473131837] [2022-03-15 21:28:32,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473131837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:32,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719490169] [2022-03-15 21:28:32,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:32,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:32,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:32,665 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:32,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-03-15 21:28:32,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 21:28:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:32,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:32,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:32,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:32,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719490169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:32,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:32,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:28:32,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1829491239] [2022-03-15 21:28:32,983 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:32,985 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:32,994 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:32,994 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:33,095 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [8968575#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8968576#(or (< i2 (* 2 N)) (<= (* 2 N) (+ 2 i1))), 8968573#(< i2 (* 2 N)), 8968574#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:28:33,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:28:33,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:28:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=1004, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:28:33,096 INFO L87 Difference]: Start difference. First operand 8495 states and 20713 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 21:28:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:33,512 INFO L93 Difference]: Finished difference Result 10784 states and 25252 transitions. [2022-03-15 21:28:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:28:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 33 [2022-03-15 21:28:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:33,528 INFO L225 Difference]: With dead ends: 10784 [2022-03-15 21:28:33,528 INFO L226 Difference]: Without dead ends: 10780 [2022-03-15 21:28:33,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1805, Invalid=3597, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:28:33,529 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 192 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:33,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10780 states. [2022-03-15 21:28:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10780 to 8411. [2022-03-15 21:28:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8411 states, 8410 states have (on average 2.4321046373365043) internal successors, (20454), 8410 states have internal predecessors, (20454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8411 states to 8411 states and 20454 transitions. [2022-03-15 21:28:33,664 INFO L78 Accepts]: Start accepts. Automaton has 8411 states and 20454 transitions. Word has length 33 [2022-03-15 21:28:33,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:33,664 INFO L470 AbstractCegarLoop]: Abstraction has 8411 states and 20454 transitions. [2022-03-15 21:28:33,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 21:28:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8411 states and 20454 transitions. [2022-03-15 21:28:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:33,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:33,676 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:33,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:33,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:33,891 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1596748925, now seen corresponding path program 499 times [2022-03-15 21:28:33,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:33,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072126889] [2022-03-15 21:28:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:33,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 61 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:34,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:34,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072126889] [2022-03-15 21:28:34,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072126889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:34,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271418550] [2022-03-15 21:28:34,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:34,010 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:34,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-03-15 21:28:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 61 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:34,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 61 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:34,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271418550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:34,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:34,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 22] total 35 [2022-03-15 21:28:34,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1467213650] [2022-03-15 21:28:34,407 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:34,409 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:34,419 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:34,419 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:34,540 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [8996479#(or (<= (* 2 N) (+ i1 1)) (< i2 (* 2 N))), 8996477#(< i2 (* 2 N)), 8996478#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:28:34,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:28:34,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:34,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:28:34,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=883, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:28:34,541 INFO L87 Difference]: Start difference. First operand 8411 states and 20454 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 21:28:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:34,989 INFO L93 Difference]: Finished difference Result 10391 states and 24314 transitions. [2022-03-15 21:28:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:28:34,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 33 [2022-03-15 21:28:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:35,004 INFO L225 Difference]: With dead ends: 10391 [2022-03-15 21:28:35,004 INFO L226 Difference]: Without dead ends: 10388 [2022-03-15 21:28:35,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1748, Invalid=3508, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:28:35,005 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 134 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:35,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10388 states. [2022-03-15 21:28:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10388 to 8410. [2022-03-15 21:28:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8410 states, 8409 states have (on average 2.431799262694732) internal successors, (20449), 8409 states have internal predecessors, (20449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8410 states to 8410 states and 20449 transitions. [2022-03-15 21:28:35,131 INFO L78 Accepts]: Start accepts. Automaton has 8410 states and 20449 transitions. Word has length 33 [2022-03-15 21:28:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:35,131 INFO L470 AbstractCegarLoop]: Abstraction has 8410 states and 20449 transitions. [2022-03-15 21:28:35,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 21:28:35,132 INFO L276 IsEmpty]: Start isEmpty. Operand 8410 states and 20449 transitions. [2022-03-15 21:28:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:35,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:35,141 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:35,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:35,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-03-15 21:28:35,356 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1211029751, now seen corresponding path program 500 times [2022-03-15 21:28:35,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:35,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746123790] [2022-03-15 21:28:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:35,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:35,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746123790] [2022-03-15 21:28:35,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746123790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:35,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552462088] [2022-03-15 21:28:35,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:35,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:35,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:35,456 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:35,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-03-15 21:28:35,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:35,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:35,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:35,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552462088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:35,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:35,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:28:35,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [114351535] [2022-03-15 21:28:35,782 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:35,784 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:35,794 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:35,794 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:35,864 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9023987#(< i2 (* 2 N)), 9023988#(or (< i2 (* 2 N)) (<= (* 2 N) i1))] [2022-03-15 21:28:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:28:35,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:28:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=811, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:28:35,865 INFO L87 Difference]: Start difference. First operand 8410 states and 20449 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 21:28:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:36,248 INFO L93 Difference]: Finished difference Result 10005 states and 23496 transitions. [2022-03-15 21:28:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:28:36,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 33 [2022-03-15 21:28:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:36,262 INFO L225 Difference]: With dead ends: 10005 [2022-03-15 21:28:36,262 INFO L226 Difference]: Without dead ends: 10003 [2022-03-15 21:28:36,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1749, Invalid=3507, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:28:36,263 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 86 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:36,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2022-03-15 21:28:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 8410. [2022-03-15 21:28:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8410 states, 8409 states have (on average 2.4315614222856463) internal successors, (20447), 8409 states have internal predecessors, (20447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8410 states to 8410 states and 20447 transitions. [2022-03-15 21:28:36,391 INFO L78 Accepts]: Start accepts. Automaton has 8410 states and 20447 transitions. Word has length 33 [2022-03-15 21:28:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:36,391 INFO L470 AbstractCegarLoop]: Abstraction has 8410 states and 20447 transitions. [2022-03-15 21:28:36,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 21:28:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8410 states and 20447 transitions. [2022-03-15 21:28:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:36,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:36,401 INFO L514 BasicCegarLoop]: trace histogram [14, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:36,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-03-15 21:28:36,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2022-03-15 21:28:36,604 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1564318523, now seen corresponding path program 501 times [2022-03-15 21:28:36,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:36,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017367319] [2022-03-15 21:28:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:36,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 92 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:28:36,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:36,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017367319] [2022-03-15 21:28:36,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017367319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:36,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962687783] [2022-03-15 21:28:36,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:36,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:36,805 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:36,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-03-15 21:28:36,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:28:36,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:28:36,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 14 proven. 66 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-15 21:28:37,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-15 21:28:37,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962687783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:37,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:37,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 4] total 40 [2022-03-15 21:28:37,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1262512675] [2022-03-15 21:28:37,218 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:37,220 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:37,233 INFO L252 McrAutomatonBuilder]: Finished intersection with 76 states and 117 transitions. [2022-03-15 21:28:37,233 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:38,112 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 28 new interpolants: [9051137#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 9051117#(< i2 (* 2 N)), 9051129#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11))), 9051118#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9051124#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 9051143#(or (<= (* 2 N) (+ 9 i2)) (< i1 (* 2 N))), 9051132#(<= (* 2 N) (+ i2 11)), 9051130#(or (<= (* 2 N) (+ i2 12)) (< (+ i2 13) (* 2 N))), 9051125#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 9051138#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 9051120#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9051072#(< i1 (* 2 N)), 9051139#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9051127#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 9051122#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 9051126#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 9051131#(or (<= (* 2 N) (+ i2 13)) (< (+ 14 i2) (* 2 N))), 9051119#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9051133#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 9051142#(or (< i1 (* 2 N)) (<= (* 2 N) (+ i2 8))), 9051140#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 9051136#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9051141#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 7 i2))), 9051123#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9051128#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 9051135#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 9051121#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9051134#(or (< i1 (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:28:38,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-15 21:28:38,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-15 21:28:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=3953, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:28:38,113 INFO L87 Difference]: Start difference. First operand 8410 states and 20447 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:48,084 INFO L93 Difference]: Finished difference Result 13234 states and 30663 transitions. [2022-03-15 21:28:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2022-03-15 21:28:48,084 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:48,103 INFO L225 Difference]: With dead ends: 13234 [2022-03-15 21:28:48,103 INFO L226 Difference]: Without dead ends: 12831 [2022-03-15 21:28:48,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46499 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=15435, Invalid=110235, Unknown=0, NotChecked=0, Total=125670 [2022-03-15 21:28:48,113 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 858 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 2011 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2011 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:48,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 1 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2011 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 21:28:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2022-03-15 21:28:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 7903. [2022-03-15 21:28:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7903 states, 7902 states have (on average 2.460010124019236) internal successors, (19439), 7902 states have internal predecessors, (19439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7903 states to 7903 states and 19439 transitions. [2022-03-15 21:28:48,247 INFO L78 Accepts]: Start accepts. Automaton has 7903 states and 19439 transitions. Word has length 33 [2022-03-15 21:28:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:48,247 INFO L470 AbstractCegarLoop]: Abstraction has 7903 states and 19439 transitions. [2022-03-15 21:28:48,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7903 states and 19439 transitions. [2022-03-15 21:28:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:48,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:48,256 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:48,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Ended with exit code 0 [2022-03-15 21:28:48,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2022-03-15 21:28:48,470 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1198587197, now seen corresponding path program 502 times [2022-03-15 21:28:48,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:48,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356847000] [2022-03-15 21:28:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:48,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:48,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:48,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356847000] [2022-03-15 21:28:48,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356847000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:48,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998645788] [2022-03-15 21:28:48,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:48,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:48,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:48,541 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:48,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-03-15 21:28:48,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:48,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:48,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:48,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:48,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:48,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998645788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:48,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:48,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 34 [2022-03-15 21:28:48,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2021410647] [2022-03-15 21:28:48,816 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:48,818 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:48,827 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 63 transitions. [2022-03-15 21:28:48,827 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:48,876 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9080985#(< i2 (* 2 N))] [2022-03-15 21:28:48,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:28:48,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:28:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=701, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:28:48,877 INFO L87 Difference]: Start difference. First operand 7903 states and 19439 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 21:28:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:49,202 INFO L93 Difference]: Finished difference Result 9044 states and 21739 transitions. [2022-03-15 21:28:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 21:28:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 33 [2022-03-15 21:28:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:49,213 INFO L225 Difference]: With dead ends: 9044 [2022-03-15 21:28:49,213 INFO L226 Difference]: Without dead ends: 9043 [2022-03-15 21:28:49,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1681, Invalid=3431, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:28:49,214 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 86 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:49,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9043 states. [2022-03-15 21:28:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9043 to 8017. [2022-03-15 21:28:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:28:49,317 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:28:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:49,317 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:28:49,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 21:28:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:28:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:49,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:49,326 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:49,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Ended with exit code 0 [2022-03-15 21:28:49,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:49,541 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1697288537, now seen corresponding path program 503 times [2022-03-15 21:28:49,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:49,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604671949] [2022-03-15 21:28:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 80 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:49,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:49,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604671949] [2022-03-15 21:28:49,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604671949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:49,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020418376] [2022-03-15 21:28:49,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:49,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:49,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:49,612 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:49,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-03-15 21:28:49,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:28:49,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 80 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:49,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 80 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:49,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020418376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:49,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:49,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:28:49,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55714421] [2022-03-15 21:28:49,904 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:49,906 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:49,915 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 65 transitions. [2022-03-15 21:28:49,915 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:49,990 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9106364#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:28:49,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:28:49,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:28:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=769, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:28:49,991 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:28:50,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:50,219 INFO L93 Difference]: Finished difference Result 9361 states and 22438 transitions. [2022-03-15 21:28:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:28:50,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 33 [2022-03-15 21:28:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:50,233 INFO L225 Difference]: With dead ends: 9361 [2022-03-15 21:28:50,233 INFO L226 Difference]: Without dead ends: 9361 [2022-03-15 21:28:50,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1332, Invalid=2574, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:28:50,234 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 100 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:50,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2022-03-15 21:28:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 8017. [2022-03-15 21:28:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:28:50,348 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:28:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:50,348 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:28:50,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:28:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:28:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:50,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:50,358 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:50,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Ended with exit code 0 [2022-03-15 21:28:50,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:50,574 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:50,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1742372105, now seen corresponding path program 504 times [2022-03-15 21:28:50,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:50,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512984071] [2022-03-15 21:28:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:50,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 81 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:50,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:50,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512984071] [2022-03-15 21:28:50,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512984071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:50,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942469849] [2022-03-15 21:28:50,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:28:50,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:50,683 INFO L229 MonitoredProcess]: Starting monitored process 505 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:50,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-03-15 21:28:50,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:28:50,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 81 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 81 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:51,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942469849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:51,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:51,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 22] total 35 [2022-03-15 21:28:51,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [956300181] [2022-03-15 21:28:51,106 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:51,108 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:51,117 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 69 transitions. [2022-03-15 21:28:51,117 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:51,229 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9132041#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 9132040#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:28:51,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:28:51,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:28:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=867, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:28:51,230 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 21:28:51,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:51,560 INFO L93 Difference]: Finished difference Result 9615 states and 22966 transitions. [2022-03-15 21:28:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:28:51,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 33 [2022-03-15 21:28:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:51,576 INFO L225 Difference]: With dead ends: 9615 [2022-03-15 21:28:51,576 INFO L226 Difference]: Without dead ends: 9615 [2022-03-15 21:28:51,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1695, Invalid=3707, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:28:51,577 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 132 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:51,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2022-03-15 21:28:51,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 8017. [2022-03-15 21:28:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:28:51,750 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:28:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:51,750 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:28:51,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 21:28:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:28:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:51,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:51,760 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:51,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Ended with exit code 0 [2022-03-15 21:28:51,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,505 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:51,975 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:51,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:51,976 INFO L85 PathProgramCache]: Analyzing trace with hash 997669607, now seen corresponding path program 505 times [2022-03-15 21:28:51,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:51,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478753362] [2022-03-15 21:28:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 82 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:52,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:52,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478753362] [2022-03-15 21:28:52,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478753362] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:52,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366647229] [2022-03-15 21:28:52,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:28:52,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:52,057 INFO L229 MonitoredProcess]: Starting monitored process 506 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:52,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-03-15 21:28:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:52,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 82 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:52,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 82 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:52,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366647229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:52,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:52,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 36 [2022-03-15 21:28:52,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1475917498] [2022-03-15 21:28:52,355 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:52,357 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:52,368 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 73 transitions. [2022-03-15 21:28:52,368 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:52,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [9157992#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9157994#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9157993#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:28:52,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:28:52,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:28:52,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1011, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:28:52,483 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 21:28:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:52,952 INFO L93 Difference]: Finished difference Result 9754 states and 23249 transitions. [2022-03-15 21:28:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 21:28:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 33 [2022-03-15 21:28:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:52,968 INFO L225 Difference]: With dead ends: 9754 [2022-03-15 21:28:52,968 INFO L226 Difference]: Without dead ends: 9754 [2022-03-15 21:28:52,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2287, Invalid=5723, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:28:52,969 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 180 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:52,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:28:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9754 states. [2022-03-15 21:28:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9754 to 8017. [2022-03-15 21:28:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:28:53,098 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:28:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:53,099 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:28:53,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 21:28:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:28:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:53,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:53,109 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:53,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Ended with exit code 0 [2022-03-15 21:28:53,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2022-03-15 21:28:53,323 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash -613271351, now seen corresponding path program 506 times [2022-03-15 21:28:53,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:53,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009977091] [2022-03-15 21:28:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:53,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 83 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:53,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:53,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009977091] [2022-03-15 21:28:53,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009977091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:53,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698065369] [2022-03-15 21:28:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:28:53,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:53,460 INFO L229 MonitoredProcess]: Starting monitored process 507 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:53,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-03-15 21:28:53,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:28:53,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 83 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:53,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 83 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:53,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698065369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:53,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:53,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 36 [2022-03-15 21:28:53,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1180664368] [2022-03-15 21:28:53,874 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:53,876 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:53,887 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 77 transitions. [2022-03-15 21:28:53,887 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:54,032 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [9184114#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9184115#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9184113#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 9184112#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:28:54,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:28:54,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:28:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:28:54,033 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:54,663 INFO L93 Difference]: Finished difference Result 9751 states and 23238 transitions. [2022-03-15 21:28:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 21:28:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:54,680 INFO L225 Difference]: With dead ends: 9751 [2022-03-15 21:28:54,680 INFO L226 Difference]: Without dead ends: 9751 [2022-03-15 21:28:54,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2564, Invalid=6366, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:28:54,681 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 194 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:54,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 1 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9751 states. [2022-03-15 21:28:54,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9751 to 8017. [2022-03-15 21:28:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:28:54,808 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:28:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:54,809 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:28:54,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:28:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:54,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:54,844 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:54,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:55,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,507 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:55,055 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash 987166503, now seen corresponding path program 507 times [2022-03-15 21:28:55,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:55,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958224564] [2022-03-15 21:28:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 84 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:55,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:55,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958224564] [2022-03-15 21:28:55,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958224564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:55,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152890901] [2022-03-15 21:28:55,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:28:55,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:55,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:55,220 INFO L229 MonitoredProcess]: Starting monitored process 508 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:55,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-03-15 21:28:55,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:28:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:55,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 84 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:55,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 84 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:28:55,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152890901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:55,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:55,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 37 [2022-03-15 21:28:55,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [639931689] [2022-03-15 21:28:55,664 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:55,666 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:55,677 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 81 transitions. [2022-03-15 21:28:55,677 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:55,896 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [9210239#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9210241#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9210242#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9210243#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 9210240#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:28:55,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:28:55,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:55,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:28:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:28:55,896 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:56,854 INFO L93 Difference]: Finished difference Result 9759 states and 23262 transitions. [2022-03-15 21:28:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 21:28:56,855 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:56,869 INFO L225 Difference]: With dead ends: 9759 [2022-03-15 21:28:56,869 INFO L226 Difference]: Without dead ends: 9759 [2022-03-15 21:28:56,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3320, Invalid=9112, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 21:28:56,871 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 281 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:56,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 1 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:28:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9759 states. [2022-03-15 21:28:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9759 to 8017. [2022-03-15 21:28:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:28:56,990 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:28:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:56,990 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:28:56,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:28:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:57,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:57,000 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:57,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Forceful destruction successful, exit code 0 [2022-03-15 21:28:57,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,508 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:57,216 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash -938867575, now seen corresponding path program 508 times [2022-03-15 21:28:57,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:57,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015402065] [2022-03-15 21:28:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:57,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 85 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:57,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:57,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015402065] [2022-03-15 21:28:57,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015402065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:57,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888801222] [2022-03-15 21:28:57,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:28:57,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:57,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:57,371 INFO L229 MonitoredProcess]: Starting monitored process 509 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:57,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-03-15 21:28:57,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:28:57,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:57,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 85 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:57,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:28:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 85 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:57,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888801222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:28:57,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:28:57,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 24] total 37 [2022-03-15 21:28:57,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1123189415] [2022-03-15 21:28:57,813 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:28:57,815 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:28:57,826 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 85 transitions. [2022-03-15 21:28:57,826 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:28:58,149 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [9236407#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9236408#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9236406#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 9236409#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 9236410#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9236405#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N)))] [2022-03-15 21:28:58,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:28:58,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:28:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:28:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:28:58,150 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:28:59,311 INFO L93 Difference]: Finished difference Result 9607 states and 22940 transitions. [2022-03-15 21:28:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 21:28:59,311 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:28:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:28:59,326 INFO L225 Difference]: With dead ends: 9607 [2022-03-15 21:28:59,326 INFO L226 Difference]: Without dead ends: 9607 [2022-03-15 21:28:59,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4544 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3429, Invalid=9227, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 21:28:59,328 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 272 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:28:59,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 1 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:28:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9607 states. [2022-03-15 21:28:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9607 to 8017. [2022-03-15 21:28:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:59,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:28:59,459 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:28:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:28:59,459 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:28:59,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:28:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:28:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:28:59,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:28:59,468 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:28:59,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Ended with exit code 0 [2022-03-15 21:28:59,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2022-03-15 21:28:59,678 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:28:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:28:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash -516381849, now seen corresponding path program 509 times [2022-03-15 21:28:59,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:28:59,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079139468] [2022-03-15 21:28:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:28:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:28:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:28:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 86 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:59,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:28:59,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079139468] [2022-03-15 21:28:59,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079139468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:28:59,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156403758] [2022-03-15 21:28:59,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:28:59,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:28:59,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:28:59,846 INFO L229 MonitoredProcess]: Starting monitored process 510 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:28:59,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-03-15 21:28:59,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:28:59,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:28:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:28:59,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:28:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 86 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:28:59,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 86 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:00,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156403758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:00,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:00,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 25] total 38 [2022-03-15 21:29:00,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [420100758] [2022-03-15 21:29:00,278 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:00,280 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:00,291 INFO L252 McrAutomatonBuilder]: Finished intersection with 62 states and 89 transitions. [2022-03-15 21:29:00,292 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:00,524 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [9262422#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 9262421#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9262425#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 9262423#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9262424#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9262426#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9262427#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N)))] [2022-03-15 21:29:00,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:29:00,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:29:00,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:29:00,525 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:01,593 INFO L93 Difference]: Finished difference Result 9628 states and 23039 transitions. [2022-03-15 21:29:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 21:29:01,593 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:29:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:01,607 INFO L225 Difference]: With dead ends: 9628 [2022-03-15 21:29:01,608 INFO L226 Difference]: Without dead ends: 9628 [2022-03-15 21:29:01,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6255 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4316, Invalid=12454, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 21:29:01,610 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 273 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:01,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9628 states. [2022-03-15 21:29:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9628 to 8017. [2022-03-15 21:29:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:29:01,725 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:29:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:01,725 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:29:01,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:29:01,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:29:01,735 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:01,735 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:01,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:01,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,510 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:01,939 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash -304226231, now seen corresponding path program 510 times [2022-03-15 21:29:01,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:01,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463599455] [2022-03-15 21:29:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:01,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 87 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:02,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:02,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463599455] [2022-03-15 21:29:02,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463599455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:02,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688573701] [2022-03-15 21:29:02,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:02,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:02,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:02,127 INFO L229 MonitoredProcess]: Starting monitored process 511 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:02,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-03-15 21:29:02,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:29:02,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 87 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:02,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 87 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:02,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688573701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:02,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:02,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 38 [2022-03-15 21:29:02,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [768621970] [2022-03-15 21:29:02,484 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:02,486 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:02,498 INFO L252 McrAutomatonBuilder]: Finished intersection with 64 states and 93 transitions. [2022-03-15 21:29:02,498 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:02,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [9288491#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9288496#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 9288492#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9288493#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 9288495#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 9288489#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9288490#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 9288494#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:29:02,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:29:02,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:29:02,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1623, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:29:02,733 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:03,819 INFO L93 Difference]: Finished difference Result 9403 states and 22570 transitions. [2022-03-15 21:29:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 21:29:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:29:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:03,835 INFO L225 Difference]: With dead ends: 9403 [2022-03-15 21:29:03,835 INFO L226 Difference]: Without dead ends: 9403 [2022-03-15 21:29:03,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5789 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4122, Invalid=11880, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 21:29:03,837 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 312 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:03,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 1 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9403 states. [2022-03-15 21:29:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9403 to 8017. [2022-03-15 21:29:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:03,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:29:03,959 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:29:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:03,959 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:29:03,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:03,959 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:29:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:29:03,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:03,969 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:03,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:04,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2022-03-15 21:29:04,184 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1977630631, now seen corresponding path program 511 times [2022-03-15 21:29:04,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:04,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574110042] [2022-03-15 21:29:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:04,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:04,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:04,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574110042] [2022-03-15 21:29:04,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574110042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:04,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699745721] [2022-03-15 21:29:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:04,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:04,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:04,303 INFO L229 MonitoredProcess]: Starting monitored process 512 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:04,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-03-15 21:29:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:04,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:04,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699745721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:04,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:04,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 26] total 39 [2022-03-15 21:29:04,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1091378195] [2022-03-15 21:29:04,588 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:04,590 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:04,603 INFO L252 McrAutomatonBuilder]: Finished intersection with 66 states and 97 transitions. [2022-03-15 21:29:04,603 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:04,861 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [9314326#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9314333#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 9314332#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 9314328#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9314330#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 9314329#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9314331#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9314327#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 9314334#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8)))] [2022-03-15 21:29:04,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:29:04,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:29:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1791, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:29:04,862 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:06,255 INFO L93 Difference]: Finished difference Result 9561 states and 23048 transitions. [2022-03-15 21:29:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 21:29:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:29:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:06,268 INFO L225 Difference]: With dead ends: 9561 [2022-03-15 21:29:06,268 INFO L226 Difference]: Without dead ends: 9561 [2022-03-15 21:29:06,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7752 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5128, Invalid=15464, Unknown=0, NotChecked=0, Total=20592 [2022-03-15 21:29:06,271 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 315 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:06,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9561 states. [2022-03-15 21:29:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9561 to 8017. [2022-03-15 21:29:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:29:06,421 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:29:06,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:06,421 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:29:06,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:29:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:29:06,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:06,430 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:06,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:06,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2022-03-15 21:29:06,635 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:06,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:06,636 INFO L85 PathProgramCache]: Analyzing trace with hash -299250679, now seen corresponding path program 512 times [2022-03-15 21:29:06,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:06,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916079814] [2022-03-15 21:29:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:06,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 89 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:06,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:06,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916079814] [2022-03-15 21:29:06,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916079814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:06,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687262993] [2022-03-15 21:29:06,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:06,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:06,789 INFO L229 MonitoredProcess]: Starting monitored process 513 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:06,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-03-15 21:29:06,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:06,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:06,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 89 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:06,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 89 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:07,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687262993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:07,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:07,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 39 [2022-03-15 21:29:07,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [235450817] [2022-03-15 21:29:07,068 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:07,070 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:07,082 INFO L252 McrAutomatonBuilder]: Finished intersection with 68 states and 101 transitions. [2022-03-15 21:29:07,082 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:07,375 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [9340356#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 9340359#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 9340360#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 9340355#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9340354#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9340352#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9340357#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9340358#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 9340361#(or (<= (* 2 N) (+ 9 i2)) (<= (+ i2 11) (* 2 N))), 9340353#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:29:07,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:29:07,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:29:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=1893, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:29:07,376 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:08,802 INFO L93 Difference]: Finished difference Result 9307 states and 22532 transitions. [2022-03-15 21:29:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 21:29:08,802 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:29:08,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:08,817 INFO L225 Difference]: With dead ends: 9307 [2022-03-15 21:29:08,817 INFO L226 Difference]: Without dead ends: 9307 [2022-03-15 21:29:08,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6732 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4514, Invalid=14118, Unknown=0, NotChecked=0, Total=18632 [2022-03-15 21:29:08,820 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 277 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:08,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2022-03-15 21:29:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 8017. [2022-03-15 21:29:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8016 states have (on average 2.468313373253493) internal successors, (19786), 8016 states have internal predecessors, (19786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 19786 transitions. [2022-03-15 21:29:08,941 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 19786 transitions. Word has length 33 [2022-03-15 21:29:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:08,941 INFO L470 AbstractCegarLoop]: Abstraction has 8017 states and 19786 transitions. [2022-03-15 21:29:08,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 19786 transitions. [2022-03-15 21:29:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:29:08,950 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:08,950 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:08,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:09,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,513 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:09,166 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2131872743, now seen corresponding path program 513 times [2022-03-15 21:29:09,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:09,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100911284] [2022-03-15 21:29:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:09,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:09,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:09,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100911284] [2022-03-15 21:29:09,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100911284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:09,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804851615] [2022-03-15 21:29:09,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:09,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:09,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:09,304 INFO L229 MonitoredProcess]: Starting monitored process 514 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:09,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-03-15 21:29:09,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:29:09,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:09,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:09,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804851615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:09,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:09,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 27] total 40 [2022-03-15 21:29:09,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1070399970] [2022-03-15 21:29:09,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:09,593 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:09,606 INFO L252 McrAutomatonBuilder]: Finished intersection with 70 states and 105 transitions. [2022-03-15 21:29:09,606 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:09,969 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [9366114#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 9366113#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9366110#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9366115#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9366116#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 9366118#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 9366112#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9366119#(or (<= (* 2 N) (+ 9 i2)) (<= (+ i2 11) (* 2 N))), 9366120#(or (<= (* 2 N) (+ i2 10)) (<= (+ i2 12) (* 2 N))), 9366117#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 9366111#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N)))] [2022-03-15 21:29:09,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 21:29:09,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:09,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 21:29:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:29:09,970 INFO L87 Difference]: Start difference. First operand 8017 states and 19786 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 21:29:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:12,077 INFO L93 Difference]: Finished difference Result 9681 states and 23586 transitions. [2022-03-15 21:29:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-15 21:29:12,077 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) Word has length 33 [2022-03-15 21:29:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:12,093 INFO L225 Difference]: With dead ends: 9681 [2022-03-15 21:29:12,093 INFO L226 Difference]: Without dead ends: 9681 [2022-03-15 21:29:12,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8635 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5548, Invalid=17708, Unknown=0, NotChecked=0, Total=23256 [2022-03-15 21:29:12,096 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 263 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:12,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:29:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9681 states. [2022-03-15 21:29:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9681 to 7969. [2022-03-15 21:29:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7969 states, 7968 states have (on average 2.4646084337349397) internal successors, (19638), 7968 states have internal predecessors, (19638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7969 states to 7969 states and 19638 transitions. [2022-03-15 21:29:12,220 INFO L78 Accepts]: Start accepts. Automaton has 7969 states and 19638 transitions. Word has length 33 [2022-03-15 21:29:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:12,221 INFO L470 AbstractCegarLoop]: Abstraction has 7969 states and 19638 transitions. [2022-03-15 21:29:12,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 21:29:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7969 states and 19638 transitions. [2022-03-15 21:29:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 21:29:12,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:12,231 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:12,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Ended with exit code 0 [2022-03-15 21:29:12,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable515 [2022-03-15 21:29:12,443 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash 187287497, now seen corresponding path program 514 times [2022-03-15 21:29:12,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:12,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565164432] [2022-03-15 21:29:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:12,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:12,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:12,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565164432] [2022-03-15 21:29:12,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565164432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:12,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991989885] [2022-03-15 21:29:12,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:12,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:12,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:12,602 INFO L229 MonitoredProcess]: Starting monitored process 515 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:12,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-03-15 21:29:12,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:12,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:12,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:12,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:12,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991989885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:12,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:12,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 40 [2022-03-15 21:29:12,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2047222860] [2022-03-15 21:29:12,873 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:12,875 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:12,889 INFO L252 McrAutomatonBuilder]: Finished intersection with 74 states and 113 transitions. [2022-03-15 21:29:12,889 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:13,244 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [9392178#(or (<= (* 2 N) (+ 3 i2)) (<= (+ 5 i2) (* 2 N))), 9392185#(or (<= (* 2 N) (+ i2 10)) (<= (+ i2 12) (* 2 N))), 9392180#(or (<= (+ 7 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9392179#(or (<= (* 2 N) (+ i2 4)) (<= (+ 6 i2) (* 2 N))), 9392176#(or (<= (* 2 N) (+ i2 1)) (<= (+ 3 i2) (* 2 N))), 9392175#(or (<= (* 2 N) i2) (<= (+ 2 i2) (* 2 N))), 9392182#(or (<= (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ 7 i2))), 9392186#(or (<= (* 2 N) (+ i2 11)) (<= (+ i2 13) (* 2 N))), 9392177#(or (<= (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9392181#(or (<= (* 2 N) (+ 6 i2)) (<= (+ i2 8) (* 2 N))), 9392183#(or (<= (+ i2 10) (* 2 N)) (<= (* 2 N) (+ i2 8))), 9392184#(or (<= (* 2 N) (+ 9 i2)) (<= (+ i2 11) (* 2 N)))] [2022-03-15 21:29:13,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 21:29:13,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 21:29:13,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:29:13,245 INFO L87 Difference]: Start difference. First operand 7969 states and 19638 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:15,822 INFO L93 Difference]: Finished difference Result 9882 states and 23950 transitions. [2022-03-15 21:29:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-15 21:29:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 21:29:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:15,838 INFO L225 Difference]: With dead ends: 9882 [2022-03-15 21:29:15,839 INFO L226 Difference]: Without dead ends: 9882 [2022-03-15 21:29:15,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8671 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5707, Invalid=18163, Unknown=0, NotChecked=0, Total=23870 [2022-03-15 21:29:15,841 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 264 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:15,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 1 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:29:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9882 states. [2022-03-15 21:29:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9882 to 7958. [2022-03-15 21:29:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 7957 states have (on average 2.4680155837627247) internal successors, (19638), 7957 states have internal predecessors, (19638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 19638 transitions. [2022-03-15 21:29:15,972 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 19638 transitions. Word has length 33 [2022-03-15 21:29:15,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:15,972 INFO L470 AbstractCegarLoop]: Abstraction has 7958 states and 19638 transitions. [2022-03-15 21:29:15,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:15,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 19638 transitions. [2022-03-15 21:29:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:15,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:15,983 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:15,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:16,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,515 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:16,198 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:16,199 INFO L85 PathProgramCache]: Analyzing trace with hash -482016600, now seen corresponding path program 515 times [2022-03-15 21:29:16,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:16,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729212887] [2022-03-15 21:29:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:16,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 91 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:16,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:16,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729212887] [2022-03-15 21:29:16,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729212887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:16,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831459892] [2022-03-15 21:29:16,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:16,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:16,445 INFO L229 MonitoredProcess]: Starting monitored process 516 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:16,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-03-15 21:29:16,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:29:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 105 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:16,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 105 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:16,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831459892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:16,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:16,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 46 [2022-03-15 21:29:16,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1786632803] [2022-03-15 21:29:16,848 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:16,850 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:16,861 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 63 transitions. [2022-03-15 21:29:16,861 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:17,122 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [9418447#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 9418450#(or (<= (+ i1 11) (* 2 N)) (< i2 (* 2 N))), 9418442#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N))), 9418440#(< i2 (* 2 N)), 9418449#(or (< i2 (* 2 N)) (<= (+ i1 10) (* 2 N))), 9418441#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 9418444#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 9418452#(or (< i2 (* 2 N)) (<= (+ i1 13) (* 2 N))), 9418445#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 9418446#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 9418451#(or (<= (+ i1 12) (* 2 N)) (< i2 (* 2 N))), 9418443#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 9418448#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N)))] [2022-03-15 21:29:17,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 21:29:17,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:17,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 21:29:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=2703, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:29:17,124 INFO L87 Difference]: Start difference. First operand 7958 states and 19638 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:17,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:17,496 INFO L93 Difference]: Finished difference Result 8495 states and 20609 transitions. [2022-03-15 21:29:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:29:17,496 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:29:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:17,509 INFO L225 Difference]: With dead ends: 8495 [2022-03-15 21:29:17,509 INFO L226 Difference]: Without dead ends: 8495 [2022-03-15 21:29:17,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2009, Invalid=5131, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:29:17,511 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 177 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:17,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8495 states. [2022-03-15 21:29:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8495 to 8015. [2022-03-15 21:29:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8015 states, 8014 states have (on average 2.4722984776640877) internal successors, (19813), 8014 states have internal predecessors, (19813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8015 states to 8015 states and 19813 transitions. [2022-03-15 21:29:17,624 INFO L78 Accepts]: Start accepts. Automaton has 8015 states and 19813 transitions. Word has length 35 [2022-03-15 21:29:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:17,624 INFO L470 AbstractCegarLoop]: Abstraction has 8015 states and 19813 transitions. [2022-03-15 21:29:17,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 41 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 8015 states and 19813 transitions. [2022-03-15 21:29:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:17,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:17,634 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:17,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:17,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2022-03-15 21:29:17,848 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1005251331, now seen corresponding path program 516 times [2022-03-15 21:29:17,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:17,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080122833] [2022-03-15 21:29:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:18,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:18,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080122833] [2022-03-15 21:29:18,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080122833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:18,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65828667] [2022-03-15 21:29:18,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:18,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:18,047 INFO L229 MonitoredProcess]: Starting monitored process 517 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:18,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-03-15 21:29:18,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:29:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:18,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:18,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65828667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:18,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:18,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 43 [2022-03-15 21:29:18,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1688876359] [2022-03-15 21:29:18,333 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:18,336 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:18,374 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 65 transitions. [2022-03-15 21:29:18,374 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:18,725 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [9443287#(or (<= (+ i1 11) (* 2 N)) (< i2 (* 2 N))), 9443283#(or (< i2 (* 2 N)) (<= (+ 7 i1) (* 2 N))), 9443289#(or (< i2 (* 2 N)) (<= (+ i1 13) (* 2 N))), 9443281#(or (< i2 (* 2 N)) (<= (+ 5 i1) (* 2 N))), 9443282#(or (< i2 (* 2 N)) (<= (+ 6 i1) (* 2 N))), 9443286#(or (< i2 (* 2 N)) (<= (+ i1 10) (* 2 N))), 9443280#(or (<= (+ i1 4) (* 2 N)) (< i2 (* 2 N))), 9443285#(or (< i2 (* 2 N)) (<= (+ 9 i1) (* 2 N))), 9443288#(or (<= (+ i1 12) (* 2 N)) (< i2 (* 2 N))), 9443278#(or (< i2 (* 2 N)) (<= (+ 2 i1) (* 2 N))), 9443284#(or (< i2 (* 2 N)) (<= (+ i1 8) (* 2 N))), 9443276#(< i2 (* 2 N)), 9443277#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 9443279#(or (< i2 (* 2 N)) (<= (+ 3 i1) (* 2 N)))] [2022-03-15 21:29:18,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 21:29:18,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:18,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 21:29:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2529, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:29:18,726 INFO L87 Difference]: Start difference. First operand 8015 states and 19813 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:19,232 INFO L93 Difference]: Finished difference Result 8292 states and 20183 transitions. [2022-03-15 21:29:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:29:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:29:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:19,244 INFO L225 Difference]: With dead ends: 8292 [2022-03-15 21:29:19,244 INFO L226 Difference]: Without dead ends: 8280 [2022-03-15 21:29:19,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1991, Invalid=5149, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:29:19,245 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 165 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:19,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8280 states. [2022-03-15 21:29:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8280 to 7971. [2022-03-15 21:29:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7971 states, 7970 states have (on average 2.4680050188205773) internal successors, (19670), 7970 states have internal predecessors, (19670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7971 states to 7971 states and 19670 transitions. [2022-03-15 21:29:19,353 INFO L78 Accepts]: Start accepts. Automaton has 7971 states and 19670 transitions. Word has length 35 [2022-03-15 21:29:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:19,353 INFO L470 AbstractCegarLoop]: Abstraction has 7971 states and 19670 transitions. [2022-03-15 21:29:19,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7971 states and 19670 transitions. [2022-03-15 21:29:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:19,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:19,363 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:19,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:19,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2022-03-15 21:29:19,571 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1430028419, now seen corresponding path program 517 times [2022-03-15 21:29:19,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:19,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348947571] [2022-03-15 21:29:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:19,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:19,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:19,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348947571] [2022-03-15 21:29:19,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348947571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:19,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730350978] [2022-03-15 21:29:19,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:19,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:19,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:19,691 INFO L229 MonitoredProcess]: Starting monitored process 518 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:19,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-03-15 21:29:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:19,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:19,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:20,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730350978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:20,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:20,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:29:20,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [986175011] [2022-03-15 21:29:20,108 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:20,111 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:20,124 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 43 transitions. [2022-03-15 21:29:20,124 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:20,170 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [9467821#(< i2 (* 2 N)), 9467822#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9467820#(< i1 (* 2 N))] [2022-03-15 21:29:20,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:29:20,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:29:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=972, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:29:20,171 INFO L87 Difference]: Start difference. First operand 7971 states and 19670 transitions. Second operand has 20 states, 20 states have (on average 2.1) 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 21:29:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:20,538 INFO L93 Difference]: Finished difference Result 8640 states and 20942 transitions. [2022-03-15 21:29:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 21:29:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) 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 35 [2022-03-15 21:29:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:20,551 INFO L225 Difference]: With dead ends: 8640 [2022-03-15 21:29:20,551 INFO L226 Difference]: Without dead ends: 8634 [2022-03-15 21:29:20,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=2060, Invalid=4746, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:29:20,552 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:20,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8634 states. [2022-03-15 21:29:20,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8634 to 7957. [2022-03-15 21:29:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7957 states, 7956 states have (on average 2.4664404223227754) internal successors, (19623), 7956 states have internal predecessors, (19623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7957 states to 7957 states and 19623 transitions. [2022-03-15 21:29:20,669 INFO L78 Accepts]: Start accepts. Automaton has 7957 states and 19623 transitions. Word has length 35 [2022-03-15 21:29:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:20,669 INFO L470 AbstractCegarLoop]: Abstraction has 7957 states and 19623 transitions. [2022-03-15 21:29:20,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) 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 21:29:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7957 states and 19623 transitions. [2022-03-15 21:29:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:20,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:20,678 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:20,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:20,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,518 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:20,894 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1209331511, now seen corresponding path program 518 times [2022-03-15 21:29:20,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:20,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280533628] [2022-03-15 21:29:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:20,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 67 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:20,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:20,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280533628] [2022-03-15 21:29:20,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280533628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:20,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367381943] [2022-03-15 21:29:20,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:20,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:20,967 INFO L229 MonitoredProcess]: Starting monitored process 519 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:20,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-03-15 21:29:20,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:20,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:20,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:20,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 67 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:21,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 67 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:21,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367381943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:21,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:21,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:29:21,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1319790964] [2022-03-15 21:29:21,352 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:21,355 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:21,364 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 47 transitions. [2022-03-15 21:29:21,364 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:21,412 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [9492703#(< i2 (* 2 N)), 9492704#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9492705#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:29:21,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:29:21,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:29:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=973, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:29:21,413 INFO L87 Difference]: Start difference. First operand 7957 states and 19623 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 21:29:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:22,313 INFO L93 Difference]: Finished difference Result 9819 states and 23340 transitions. [2022-03-15 21:29:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-15 21:29:22,314 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 35 [2022-03-15 21:29:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:22,326 INFO L225 Difference]: With dead ends: 9819 [2022-03-15 21:29:22,326 INFO L226 Difference]: Without dead ends: 9810 [2022-03-15 21:29:22,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3955 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3149, Invalid=8407, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 21:29:22,327 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 170 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:22,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2022-03-15 21:29:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 8185. [2022-03-15 21:29:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8185 states, 8184 states have (on average 2.48802541544477) internal successors, (20362), 8184 states have internal predecessors, (20362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8185 states to 8185 states and 20362 transitions. [2022-03-15 21:29:22,436 INFO L78 Accepts]: Start accepts. Automaton has 8185 states and 20362 transitions. Word has length 35 [2022-03-15 21:29:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:22,436 INFO L470 AbstractCegarLoop]: Abstraction has 8185 states and 20362 transitions. [2022-03-15 21:29:22,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 21:29:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 8185 states and 20362 transitions. [2022-03-15 21:29:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:22,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:22,445 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:22,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Ended with exit code 0 [2022-03-15 21:29:22,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2022-03-15 21:29:22,659 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1874128893, now seen corresponding path program 519 times [2022-03-15 21:29:22,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:22,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450892307] [2022-03-15 21:29:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:22,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 59 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:22,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:22,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450892307] [2022-03-15 21:29:22,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450892307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:22,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842312535] [2022-03-15 21:29:22,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:22,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:22,733 INFO L229 MonitoredProcess]: Starting monitored process 520 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:22,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-03-15 21:29:22,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 21:29:22,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:22,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:22,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 59 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:22,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 59 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:23,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842312535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:23,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:23,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:29:23,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1880020548] [2022-03-15 21:29:23,152 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:23,154 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:23,162 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:29:23,163 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:23,182 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9519270#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 9519269#(< i2 (* 2 N))] [2022-03-15 21:29:23,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:29:23,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:23,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:29:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:23,183 INFO L87 Difference]: Start difference. First operand 8185 states and 20362 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:23,407 INFO L93 Difference]: Finished difference Result 10533 states and 25127 transitions. [2022-03-15 21:29:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:29:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:29:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:23,422 INFO L225 Difference]: With dead ends: 10533 [2022-03-15 21:29:23,422 INFO L226 Difference]: Without dead ends: 10531 [2022-03-15 21:29:23,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2100, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:29:23,422 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 153 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:23,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:23,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10531 states. [2022-03-15 21:29:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10531 to 8340. [2022-03-15 21:29:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8340 states, 8339 states have (on average 2.4998201223168244) internal successors, (20846), 8339 states have internal predecessors, (20846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8340 states to 8340 states and 20846 transitions. [2022-03-15 21:29:23,541 INFO L78 Accepts]: Start accepts. Automaton has 8340 states and 20846 transitions. Word has length 35 [2022-03-15 21:29:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:23,541 INFO L470 AbstractCegarLoop]: Abstraction has 8340 states and 20846 transitions. [2022-03-15 21:29:23,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 8340 states and 20846 transitions. [2022-03-15 21:29:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:23,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:23,551 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:23,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Ended with exit code 0 [2022-03-15 21:29:23,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2022-03-15 21:29:23,763 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1640842372, now seen corresponding path program 520 times [2022-03-15 21:29:23,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:23,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791553179] [2022-03-15 21:29:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 84 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:23,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:23,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791553179] [2022-03-15 21:29:23,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791553179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:23,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402569050] [2022-03-15 21:29:23,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:23,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:23,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:23,860 INFO L229 MonitoredProcess]: Starting monitored process 521 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:23,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-03-15 21:29:23,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:23,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:29:23,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 94 proven. 101 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:29:24,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402569050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:24,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:24,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 21] total 35 [2022-03-15 21:29:24,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [237391652] [2022-03-15 21:29:24,280 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:24,283 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:24,292 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 55 transitions. [2022-03-15 21:29:24,292 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:24,439 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [9546764#(< i2 (* 2 N)), 9546771#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 9546770#(<= (* 2 N) (+ i2 1)), 9546768#(< i1 (* 2 N)), 9546765#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9546769#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9546766#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9546767#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:29:24,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:29:24,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:29:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:29:24,439 INFO L87 Difference]: Start difference. First operand 8340 states and 20846 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:25,204 INFO L93 Difference]: Finished difference Result 9855 states and 23709 transitions. [2022-03-15 21:29:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 21:29:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:29:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:25,218 INFO L225 Difference]: With dead ends: 9855 [2022-03-15 21:29:25,219 INFO L226 Difference]: Without dead ends: 9823 [2022-03-15 21:29:25,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4025 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2640, Invalid=8280, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 21:29:25,220 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 133 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:25,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2022-03-15 21:29:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 8313. [2022-03-15 21:29:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8313 states, 8312 states have (on average 2.495548604427334) internal successors, (20743), 8312 states have internal predecessors, (20743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8313 states to 8313 states and 20743 transitions. [2022-03-15 21:29:25,359 INFO L78 Accepts]: Start accepts. Automaton has 8313 states and 20743 transitions. Word has length 35 [2022-03-15 21:29:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:25,359 INFO L470 AbstractCegarLoop]: Abstraction has 8313 states and 20743 transitions. [2022-03-15 21:29:25,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 8313 states and 20743 transitions. [2022-03-15 21:29:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:25,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:25,368 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:25,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:25,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2022-03-15 21:29:25,577 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash 322127911, now seen corresponding path program 521 times [2022-03-15 21:29:25,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:25,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121059161] [2022-03-15 21:29:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:25,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:25,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:25,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121059161] [2022-03-15 21:29:25,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121059161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:25,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669141881] [2022-03-15 21:29:25,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:25,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:25,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:25,661 INFO L229 MonitoredProcess]: Starting monitored process 522 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:25,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-03-15 21:29:25,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-15 21:29:25,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:25,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:25,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:25,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:25,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669141881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:25,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:25,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:29:25,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [43868063] [2022-03-15 21:29:25,969 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:25,971 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:25,980 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 51 transitions. [2022-03-15 21:29:25,980 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:26,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [9573620#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9573619#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9573617#(< i2 (* 2 N)), 9573618#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:29:26,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:29:26,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:29:26,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=1053, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:29:26,047 INFO L87 Difference]: Start difference. First operand 8313 states and 20743 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 21:29:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:27,410 INFO L93 Difference]: Finished difference Result 10953 states and 25918 transitions. [2022-03-15 21:29:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-15 21:29:27,410 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 35 [2022-03-15 21:29:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:27,427 INFO L225 Difference]: With dead ends: 10953 [2022-03-15 21:29:27,427 INFO L226 Difference]: Without dead ends: 10930 [2022-03-15 21:29:27,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6409 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4294, Invalid=13262, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 21:29:27,430 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 181 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:27,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10930 states. [2022-03-15 21:29:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10930 to 8530. [2022-03-15 21:29:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8530 states, 8529 states have (on average 2.5164732090514716) internal successors, (21463), 8529 states have internal predecessors, (21463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8530 states to 8530 states and 21463 transitions. [2022-03-15 21:29:27,558 INFO L78 Accepts]: Start accepts. Automaton has 8530 states and 21463 transitions. Word has length 35 [2022-03-15 21:29:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:27,558 INFO L470 AbstractCegarLoop]: Abstraction has 8530 states and 21463 transitions. [2022-03-15 21:29:27,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 21:29:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 8530 states and 21463 transitions. [2022-03-15 21:29:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:27,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:27,568 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:27,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:27,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,522 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:27,771 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash -32586109, now seen corresponding path program 522 times [2022-03-15 21:29:27,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:27,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717909314] [2022-03-15 21:29:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:27,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:27,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:27,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717909314] [2022-03-15 21:29:27,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717909314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:27,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327693730] [2022-03-15 21:29:27,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:27,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:27,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:27,883 INFO L229 MonitoredProcess]: Starting monitored process 523 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:27,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-03-15 21:29:27,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 21:29:27,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:27,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:28,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:28,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327693730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:28,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:28,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:29:28,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [62614011] [2022-03-15 21:29:28,318 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:28,321 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:28,329 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:29:28,329 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:28,362 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9602056#(< i2 (* 2 N)), 9602057#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:29:28,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:29:28,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:29:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:28,362 INFO L87 Difference]: Start difference. First operand 8530 states and 21463 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:28,690 INFO L93 Difference]: Finished difference Result 11502 states and 27476 transitions. [2022-03-15 21:29:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:29:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:29:28,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:28,707 INFO L225 Difference]: With dead ends: 11502 [2022-03-15 21:29:28,707 INFO L226 Difference]: Without dead ends: 11500 [2022-03-15 21:29:28,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1151, Invalid=1929, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:29:28,707 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 142 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:28,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:29:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2022-03-15 21:29:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 8664. [2022-03-15 21:29:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8664 states, 8663 states have (on average 2.52868521297472) internal successors, (21906), 8663 states have internal predecessors, (21906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8664 states to 8664 states and 21906 transitions. [2022-03-15 21:29:28,855 INFO L78 Accepts]: Start accepts. Automaton has 8664 states and 21906 transitions. Word has length 35 [2022-03-15 21:29:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:28,855 INFO L470 AbstractCegarLoop]: Abstraction has 8664 states and 21906 transitions. [2022-03-15 21:29:28,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 8664 states and 21906 transitions. [2022-03-15 21:29:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:28,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:28,865 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:28,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:29,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,523 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:29,079 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:29,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:29,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1903780022, now seen corresponding path program 523 times [2022-03-15 21:29:29,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:29,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798821254] [2022-03-15 21:29:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 76 proven. 120 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:29,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:29,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798821254] [2022-03-15 21:29:29,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798821254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:29,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979795259] [2022-03-15 21:29:29,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:29,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:29,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:29,174 INFO L229 MonitoredProcess]: Starting monitored process 524 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:29,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-03-15 21:29:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 85 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:29:29,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 85 proven. 110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:29:29,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979795259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:29,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:29,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 22] total 36 [2022-03-15 21:29:29,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [802865069] [2022-03-15 21:29:29,501 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:29,503 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:29,513 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 59 transitions. [2022-03-15 21:29:29,513 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:29,670 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [9631170#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 9631168#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9631173#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 9631167#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9631174#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 9631171#(< i1 (* 2 N)), 9631172#(<= (* 2 N) (+ 2 i2)), 9631169#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9631165#(< i2 (* 2 N)), 9631166#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2))] [2022-03-15 21:29:29,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:29:29,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:29,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:29:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:29:29,671 INFO L87 Difference]: Start difference. First operand 8664 states and 21906 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) 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 21:29:30,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:30,913 INFO L93 Difference]: Finished difference Result 10701 states and 25869 transitions. [2022-03-15 21:29:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 21:29:30,914 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) 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 35 [2022-03-15 21:29:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:30,931 INFO L225 Difference]: With dead ends: 10701 [2022-03-15 21:29:30,931 INFO L226 Difference]: Without dead ends: 10655 [2022-03-15 21:29:30,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6313 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3586, Invalid=13184, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 21:29:30,933 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 164 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:30,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10655 states. [2022-03-15 21:29:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10655 to 8639. [2022-03-15 21:29:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8639 states, 8638 states have (on average 2.5245427182218108) internal successors, (21807), 8638 states have internal predecessors, (21807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8639 states to 8639 states and 21807 transitions. [2022-03-15 21:29:31,070 INFO L78 Accepts]: Start accepts. Automaton has 8639 states and 21807 transitions. Word has length 35 [2022-03-15 21:29:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:31,070 INFO L470 AbstractCegarLoop]: Abstraction has 8639 states and 21807 transitions. [2022-03-15 21:29:31,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) 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 21:29:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 8639 states and 21807 transitions. [2022-03-15 21:29:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:31,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:31,080 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:31,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Ended with exit code 0 [2022-03-15 21:29:31,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2022-03-15 21:29:31,296 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 552729737, now seen corresponding path program 524 times [2022-03-15 21:29:31,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:31,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4132559] [2022-03-15 21:29:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:31,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 51 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:31,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:31,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4132559] [2022-03-15 21:29:31,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4132559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:31,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258589352] [2022-03-15 21:29:31,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:31,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:31,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:31,383 INFO L229 MonitoredProcess]: Starting monitored process 525 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:31,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-03-15 21:29:31,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:31,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:31,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:31,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 51 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:31,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 51 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:31,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258589352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:31,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:31,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:29:31,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [718621396] [2022-03-15 21:29:31,758 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:31,760 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:31,769 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 55 transitions. [2022-03-15 21:29:31,769 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:31,885 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [9659563#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9659566#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9659564#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9659562#(< i2 (* 2 N)), 9659565#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N)))] [2022-03-15 21:29:31,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:29:31,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:31,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:29:31,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1135, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:29:31,886 INFO L87 Difference]: Start difference. First operand 8639 states and 21807 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 21:29:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:33,721 INFO L93 Difference]: Finished difference Result 11801 states and 27932 transitions. [2022-03-15 21:29:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-15 21:29:33,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 35 [2022-03-15 21:29:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:33,738 INFO L225 Difference]: With dead ends: 11801 [2022-03-15 21:29:33,739 INFO L226 Difference]: Without dead ends: 11764 [2022-03-15 21:29:33,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7845 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5255, Invalid=16207, Unknown=0, NotChecked=0, Total=21462 [2022-03-15 21:29:33,741 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 206 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:33,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:29:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11764 states. [2022-03-15 21:29:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11764 to 8863. [2022-03-15 21:29:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 2.542654028436019) internal successors, (22533), 8862 states have internal predecessors, (22533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 22533 transitions. [2022-03-15 21:29:33,884 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 22533 transitions. Word has length 35 [2022-03-15 21:29:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:33,884 INFO L470 AbstractCegarLoop]: Abstraction has 8863 states and 22533 transitions. [2022-03-15 21:29:33,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 21:29:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 22533 transitions. [2022-03-15 21:29:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:33,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:33,894 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:33,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Ended with exit code 0 [2022-03-15 21:29:34,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,525 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:34,107 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1220665347, now seen corresponding path program 525 times [2022-03-15 21:29:34,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:34,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036279425] [2022-03-15 21:29:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:34,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 47 proven. 147 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:34,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:34,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036279425] [2022-03-15 21:29:34,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036279425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:34,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034697553] [2022-03-15 21:29:34,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:34,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:34,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:34,184 INFO L229 MonitoredProcess]: Starting monitored process 526 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:34,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-03-15 21:29:34,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-15 21:29:34,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:34,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:34,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 47 proven. 147 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:34,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 47 proven. 147 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:34,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034697553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:34,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:34,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:29:34,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [364248157] [2022-03-15 21:29:34,506 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:34,508 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:34,517 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:29:34,517 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:34,543 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9689542#(< i2 (* 2 N)), 9689543#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:29:34,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:29:34,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:29:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:34,544 INFO L87 Difference]: Start difference. First operand 8863 states and 22533 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:34,822 INFO L93 Difference]: Finished difference Result 12243 states and 29373 transitions. [2022-03-15 21:29:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:29:34,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:29:34,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:34,843 INFO L225 Difference]: With dead ends: 12243 [2022-03-15 21:29:34,844 INFO L226 Difference]: Without dead ends: 12241 [2022-03-15 21:29:34,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1094, Invalid=1768, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:29:34,844 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 155 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:34,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 1 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2022-03-15 21:29:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 8987. [2022-03-15 21:29:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8987 states, 8986 states have (on average 2.5535277097707545) internal successors, (22946), 8986 states have internal predecessors, (22946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8987 states to 8987 states and 22946 transitions. [2022-03-15 21:29:35,003 INFO L78 Accepts]: Start accepts. Automaton has 8987 states and 22946 transitions. Word has length 35 [2022-03-15 21:29:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:35,003 INFO L470 AbstractCegarLoop]: Abstraction has 8987 states and 22946 transitions. [2022-03-15 21:29:35,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8987 states and 22946 transitions. [2022-03-15 21:29:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:35,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:35,014 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:35,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Ended with exit code 0 [2022-03-15 21:29:35,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,526 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:35,231 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash -117924540, now seen corresponding path program 526 times [2022-03-15 21:29:35,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:35,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406642452] [2022-03-15 21:29:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 70 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:35,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:35,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406642452] [2022-03-15 21:29:35,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406642452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:35,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666002492] [2022-03-15 21:29:35,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:35,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:35,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:35,331 INFO L229 MonitoredProcess]: Starting monitored process 527 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:35,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-03-15 21:29:35,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:35,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:35,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 78 proven. 116 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:29:35,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 78 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:29:35,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666002492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:35,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:35,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 23] total 37 [2022-03-15 21:29:35,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1217259394] [2022-03-15 21:29:35,660 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:35,662 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:35,672 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 63 transitions. [2022-03-15 21:29:35,673 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:35,874 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [9720040#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 9720039#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 9720036#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9720035#(< i2 (* 2 N)), 9720042#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9720037#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9720038#(< i1 (* 2 N)), 9720044#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 9720041#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 9720046#(<= (* 2 N) (+ 3 i2)), 9720043#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9720045#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2)))] [2022-03-15 21:29:35,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:29:35,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:29:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=1744, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:29:35,875 INFO L87 Difference]: Start difference. First operand 8987 states and 22946 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 21:29:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:37,229 INFO L93 Difference]: Finished difference Result 11329 states and 27526 transitions. [2022-03-15 21:29:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 21:29:37,230 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 35 [2022-03-15 21:29:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:37,248 INFO L225 Difference]: With dead ends: 11329 [2022-03-15 21:29:37,248 INFO L226 Difference]: Without dead ends: 11275 [2022-03-15 21:29:37,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6919 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3933, Invalid=14699, Unknown=0, NotChecked=0, Total=18632 [2022-03-15 21:29:37,250 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 173 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:37,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2022-03-15 21:29:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 8966. [2022-03-15 21:29:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8966 states, 8965 states have (on average 2.5498047964305632) internal successors, (22859), 8965 states have internal predecessors, (22859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 22859 transitions. [2022-03-15 21:29:37,389 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 22859 transitions. Word has length 35 [2022-03-15 21:29:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 8966 states and 22859 transitions. [2022-03-15 21:29:37,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 21:29:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 22859 transitions. [2022-03-15 21:29:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:37,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:37,400 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:37,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:37,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,527 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:37,612 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:37,612 INFO L85 PathProgramCache]: Analyzing trace with hash -888548249, now seen corresponding path program 527 times [2022-03-15 21:29:37,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:37,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117679048] [2022-03-15 21:29:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:37,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 46 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:37,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:37,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117679048] [2022-03-15 21:29:37,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117679048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:37,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509307158] [2022-03-15 21:29:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:37,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:37,697 INFO L229 MonitoredProcess]: Starting monitored process 528 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:37,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-03-15 21:29:37,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-15 21:29:37,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:37,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:37,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 46 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:37,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 46 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:38,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509307158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:38,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:38,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:29:38,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [984779114] [2022-03-15 21:29:38,058 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:38,061 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:38,071 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 59 transitions. [2022-03-15 21:29:38,071 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:38,250 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [9749724#(< i2 (* 2 N)), 9749729#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 9749728#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9749725#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9749727#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9749726#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N)))] [2022-03-15 21:29:38,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:29:38,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:38,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:29:38,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1219, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:29:38,251 INFO L87 Difference]: Start difference. First operand 8966 states and 22859 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 21:29:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:40,839 INFO L93 Difference]: Finished difference Result 12702 states and 30096 transitions. [2022-03-15 21:29:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-15 21:29:40,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 35 [2022-03-15 21:29:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:40,854 INFO L225 Difference]: With dead ends: 12702 [2022-03-15 21:29:40,854 INFO L226 Difference]: Without dead ends: 12649 [2022-03-15 21:29:40,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12645 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7336, Invalid=25606, Unknown=0, NotChecked=0, Total=32942 [2022-03-15 21:29:40,856 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 235 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:40,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:29:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12649 states. [2022-03-15 21:29:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12649 to 9195. [2022-03-15 21:29:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9195 states, 9194 states have (on average 2.5648248857950837) internal successors, (23581), 9194 states have internal predecessors, (23581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9195 states to 9195 states and 23581 transitions. [2022-03-15 21:29:40,984 INFO L78 Accepts]: Start accepts. Automaton has 9195 states and 23581 transitions. Word has length 35 [2022-03-15 21:29:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:40,984 INFO L470 AbstractCegarLoop]: Abstraction has 9195 states and 23581 transitions. [2022-03-15 21:29:40,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 21:29:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 9195 states and 23581 transitions. [2022-03-15 21:29:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:40,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:40,996 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:41,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:41,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,528 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:41,211 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1416754819, now seen corresponding path program 528 times [2022-03-15 21:29:41,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:41,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81017329] [2022-03-15 21:29:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:41,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 44 proven. 150 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:41,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:41,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81017329] [2022-03-15 21:29:41,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81017329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:41,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087825408] [2022-03-15 21:29:41,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:41,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:41,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:41,275 INFO L229 MonitoredProcess]: Starting monitored process 529 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:41,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-03-15 21:29:41,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-15 21:29:41,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 44 proven. 150 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:41,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 44 proven. 150 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:41,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087825408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:41,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:41,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:29:41,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1294584351] [2022-03-15 21:29:41,551 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:41,553 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:41,561 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:29:41,562 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:41,581 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9781339#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 9781338#(< i2 (* 2 N))] [2022-03-15 21:29:41,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:29:41,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:41,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:29:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:41,582 INFO L87 Difference]: Start difference. First operand 9195 states and 23581 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:41,790 INFO L93 Difference]: Finished difference Result 12833 states and 30918 transitions. [2022-03-15 21:29:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:29:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:29:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:41,812 INFO L225 Difference]: With dead ends: 12833 [2022-03-15 21:29:41,812 INFO L226 Difference]: Without dead ends: 12831 [2022-03-15 21:29:41,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1617, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:29:41,813 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 147 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:41,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2022-03-15 21:29:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 9309. [2022-03-15 21:29:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9309 states, 9308 states have (on average 2.574559518693597) internal successors, (23964), 9308 states have internal predecessors, (23964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9309 states to 9309 states and 23964 transitions. [2022-03-15 21:29:41,955 INFO L78 Accepts]: Start accepts. Automaton has 9309 states and 23964 transitions. Word has length 35 [2022-03-15 21:29:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:41,955 INFO L470 AbstractCegarLoop]: Abstraction has 9309 states and 23964 transitions. [2022-03-15 21:29:41,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 9309 states and 23964 transitions. [2022-03-15 21:29:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:41,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:41,965 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:41,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:42,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2022-03-15 21:29:42,180 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash -590979446, now seen corresponding path program 529 times [2022-03-15 21:29:42,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:42,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079771935] [2022-03-15 21:29:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 66 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:42,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:42,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079771935] [2022-03-15 21:29:42,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079771935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:42,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071437468] [2022-03-15 21:29:42,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:42,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:42,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:42,259 INFO L229 MonitoredProcess]: Starting monitored process 530 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:42,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-03-15 21:29:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:42,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 73 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:29:42,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 73 proven. 122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:29:42,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071437468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:42,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:42,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 23] total 37 [2022-03-15 21:29:42,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [804996850] [2022-03-15 21:29:42,512 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:42,515 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:42,525 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 67 transitions. [2022-03-15 21:29:42,525 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:42,705 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [9813064#(< i1 (* 2 N)), 9813069#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9813061#(< i2 (* 2 N)), 9813066#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 9813065#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 9813068#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 9813063#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9813072#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9813071#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 9813073#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 9813062#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9813067#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9813074#(<= (* 2 N) (+ i2 4)), 9813070#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2)))] [2022-03-15 21:29:42,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:29:42,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:42,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:29:42,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=718, Invalid=1934, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:29:42,706 INFO L87 Difference]: Start difference. First operand 9309 states and 23964 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:44,459 INFO L93 Difference]: Finished difference Result 12098 states and 29566 transitions. [2022-03-15 21:29:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-15 21:29:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:29:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:44,476 INFO L225 Difference]: With dead ends: 12098 [2022-03-15 21:29:44,476 INFO L226 Difference]: Without dead ends: 12026 [2022-03-15 21:29:44,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11214 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5640, Invalid=24116, Unknown=0, NotChecked=0, Total=29756 [2022-03-15 21:29:44,479 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 233 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:44,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2022-03-15 21:29:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 9290. [2022-03-15 21:29:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9290 states, 9289 states have (on average 2.570890300355259) internal successors, (23881), 9289 states have internal predecessors, (23881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9290 states to 9290 states and 23881 transitions. [2022-03-15 21:29:44,604 INFO L78 Accepts]: Start accepts. Automaton has 9290 states and 23881 transitions. Word has length 35 [2022-03-15 21:29:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:44,604 INFO L470 AbstractCegarLoop]: Abstraction has 9290 states and 23881 transitions. [2022-03-15 21:29:44,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 9290 states and 23881 transitions. [2022-03-15 21:29:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:44,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:44,614 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:44,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:44,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2022-03-15 21:29:44,829 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1676474441, now seen corresponding path program 530 times [2022-03-15 21:29:44,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:44,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139204228] [2022-03-15 21:29:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:44,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:44,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139204228] [2022-03-15 21:29:44,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139204228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:44,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876668296] [2022-03-15 21:29:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:29:44,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:44,913 INFO L229 MonitoredProcess]: Starting monitored process 531 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:44,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-03-15 21:29:44,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:29:44,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:45,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:45,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876668296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:45,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:45,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:29:45,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [907204601] [2022-03-15 21:29:45,291 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:45,293 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:45,303 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 63 transitions. [2022-03-15 21:29:45,303 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:45,473 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [9844239#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9844240#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9844238#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9844241#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9844242#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 9844243#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9844237#(< i2 (* 2 N))] [2022-03-15 21:29:45,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:29:45,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:45,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:29:45,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1305, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:29:45,474 INFO L87 Difference]: Start difference. First operand 9290 states and 23881 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 21:29:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:48,430 INFO L93 Difference]: Finished difference Result 13462 states and 31891 transitions. [2022-03-15 21:29:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-15 21:29:48,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 35 [2022-03-15 21:29:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:48,452 INFO L225 Difference]: With dead ends: 13462 [2022-03-15 21:29:48,452 INFO L226 Difference]: Without dead ends: 13391 [2022-03-15 21:29:48,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14636 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8566, Invalid=29654, Unknown=0, NotChecked=0, Total=38220 [2022-03-15 21:29:48,454 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 248 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:48,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 1 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:29:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13391 states. [2022-03-15 21:29:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13391 to 9526. [2022-03-15 21:29:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9526 states, 9525 states have (on average 2.583937007874016) internal successors, (24612), 9525 states have internal predecessors, (24612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9526 states to 9526 states and 24612 transitions. [2022-03-15 21:29:48,607 INFO L78 Accepts]: Start accepts. Automaton has 9526 states and 24612 transitions. Word has length 35 [2022-03-15 21:29:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:48,607 INFO L470 AbstractCegarLoop]: Abstraction has 9526 states and 24612 transitions. [2022-03-15 21:29:48,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 21:29:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 9526 states and 24612 transitions. [2022-03-15 21:29:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:48,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:48,617 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:48,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:48,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2022-03-15 21:29:48,833 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:48,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1094406141, now seen corresponding path program 531 times [2022-03-15 21:29:48,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:48,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860089248] [2022-03-15 21:29:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:48,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:48,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:48,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860089248] [2022-03-15 21:29:48,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860089248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:48,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683090546] [2022-03-15 21:29:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:29:48,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:48,895 INFO L229 MonitoredProcess]: Starting monitored process 532 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:48,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Waiting until timeout for monitored process [2022-03-15 21:29:48,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-03-15 21:29:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:48,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:49,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683090546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:49,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:49,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:29:49,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [977491516] [2022-03-15 21:29:49,176 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:49,179 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:49,187 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:29:49,187 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:49,207 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9877301#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 9877300#(< i2 (* 2 N))] [2022-03-15 21:29:49,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:29:49,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:49,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:29:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:49,208 INFO L87 Difference]: Start difference. First operand 9526 states and 24612 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:49,411 INFO L93 Difference]: Finished difference Result 13258 states and 32106 transitions. [2022-03-15 21:29:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:29:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:29:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:49,435 INFO L225 Difference]: With dead ends: 13258 [2022-03-15 21:29:49,435 INFO L226 Difference]: Without dead ends: 13256 [2022-03-15 21:29:49,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=974, Invalid=1476, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:29:49,435 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 152 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:49,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 1 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13256 states. [2022-03-15 21:29:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13256 to 9630. [2022-03-15 21:29:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9630 states, 9629 states have (on average 2.59268875272614) internal successors, (24965), 9629 states have internal predecessors, (24965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9630 states to 9630 states and 24965 transitions. [2022-03-15 21:29:49,596 INFO L78 Accepts]: Start accepts. Automaton has 9630 states and 24965 transitions. Word has length 35 [2022-03-15 21:29:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:49,596 INFO L470 AbstractCegarLoop]: Abstraction has 9630 states and 24965 transitions. [2022-03-15 21:29:49,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 9630 states and 24965 transitions. [2022-03-15 21:29:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:49,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:49,607 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:49,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Ended with exit code 0 [2022-03-15 21:29:49,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,532 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:49,811 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:49,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1924187652, now seen corresponding path program 532 times [2022-03-15 21:29:49,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:49,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940700553] [2022-03-15 21:29:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:49,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 64 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:49,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:49,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940700553] [2022-03-15 21:29:49,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940700553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:49,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036073294] [2022-03-15 21:29:49,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:29:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:49,937 INFO L229 MonitoredProcess]: Starting monitored process 533 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Waiting until timeout for monitored process [2022-03-15 21:29:49,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:29:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 70 proven. 124 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:29:50,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 70 proven. 125 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:29:50,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036073294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:50,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:50,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 24] total 38 [2022-03-15 21:29:50,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [465927167] [2022-03-15 21:29:50,251 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:50,253 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:50,264 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 71 transitions. [2022-03-15 21:29:50,265 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:50,486 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [9910101#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 9910088#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9910096#(<= (* 2 N) (+ 5 i2)), 9910089#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9910095#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 9910092#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 9910098#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 9910090#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9910091#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9910097#(< i1 (* 2 N)), 9910087#(< i2 (* 2 N)), 9910094#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 9910099#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 9910093#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9910100#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 9910102#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N)))] [2022-03-15 21:29:50,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 21:29:50,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 21:29:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:29:50,487 INFO L87 Difference]: Start difference. First operand 9630 states and 24965 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:52,488 INFO L93 Difference]: Finished difference Result 12567 states and 30847 transitions. [2022-03-15 21:29:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-15 21:29:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:29:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:52,510 INFO L225 Difference]: With dead ends: 12567 [2022-03-15 21:29:52,510 INFO L226 Difference]: Without dead ends: 12477 [2022-03-15 21:29:52,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12387 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6182, Invalid=27124, Unknown=0, NotChecked=0, Total=33306 [2022-03-15 21:29:52,514 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 247 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:52,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 1 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:29:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12477 states. [2022-03-15 21:29:52,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12477 to 9615. [2022-03-15 21:29:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9615 states, 9614 states have (on average 2.5892448512585813) internal successors, (24893), 9614 states have internal predecessors, (24893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9615 states to 9615 states and 24893 transitions. [2022-03-15 21:29:52,669 INFO L78 Accepts]: Start accepts. Automaton has 9615 states and 24893 transitions. Word has length 35 [2022-03-15 21:29:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:52,669 INFO L470 AbstractCegarLoop]: Abstraction has 9615 states and 24893 transitions. [2022-03-15 21:29:52,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 9615 states and 24893 transitions. [2022-03-15 21:29:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:52,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:52,680 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:52,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Ended with exit code 0 [2022-03-15 21:29:52,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2022-03-15 21:29:52,896 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash -412200793, now seen corresponding path program 533 times [2022-03-15 21:29:52,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:52,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223045423] [2022-03-15 21:29:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:52,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 42 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:52,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:52,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223045423] [2022-03-15 21:29:52,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223045423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:52,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176962794] [2022-03-15 21:29:52,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:29:52,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:52,989 INFO L229 MonitoredProcess]: Starting monitored process 534 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:52,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Waiting until timeout for monitored process [2022-03-15 21:29:53,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-15 21:29:53,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:53,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 42 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:29:53,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 42 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:29:53,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176962794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:53,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:53,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:29:53,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [845909693] [2022-03-15 21:29:53,286 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:53,289 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:53,300 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 67 transitions. [2022-03-15 21:29:53,300 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:53,457 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [9942402#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 9942404#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 9942403#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 9942405#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 9942399#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 9942400#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 9942401#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 9942398#(< i2 (* 2 N))] [2022-03-15 21:29:53,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:29:53,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:29:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:29:53,458 INFO L87 Difference]: Start difference. First operand 9615 states and 24893 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:56,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:56,909 INFO L93 Difference]: Finished difference Result 14429 states and 34221 transitions. [2022-03-15 21:29:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-03-15 21:29:56,910 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:29:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:56,932 INFO L225 Difference]: With dead ends: 14429 [2022-03-15 21:29:56,932 INFO L226 Difference]: Without dead ends: 14338 [2022-03-15 21:29:56,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23811 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11783, Invalid=47997, Unknown=0, NotChecked=0, Total=59780 [2022-03-15 21:29:56,938 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 331 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:56,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 1 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:29:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14338 states. [2022-03-15 21:29:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14338 to 9854. [2022-03-15 21:29:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9854 states, 9853 states have (on average 2.599715822592104) internal successors, (25615), 9853 states have internal predecessors, (25615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9854 states to 9854 states and 25615 transitions. [2022-03-15 21:29:57,108 INFO L78 Accepts]: Start accepts. Automaton has 9854 states and 25615 transitions. Word has length 35 [2022-03-15 21:29:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:57,108 INFO L470 AbstractCegarLoop]: Abstraction has 9854 states and 25615 transitions. [2022-03-15 21:29:57,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 9854 states and 25615 transitions. [2022-03-15 21:29:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:57,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:57,120 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:57,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:57,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2022-03-15 21:29:57,336 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1630984573, now seen corresponding path program 534 times [2022-03-15 21:29:57,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:57,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83071967] [2022-03-15 21:29:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 44 proven. 150 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:57,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:57,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83071967] [2022-03-15 21:29:57,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83071967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:57,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095046977] [2022-03-15 21:29:57,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:29:57,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:57,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:57,435 INFO L229 MonitoredProcess]: Starting monitored process 535 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:57,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Waiting until timeout for monitored process [2022-03-15 21:29:57,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-15 21:29:57,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:29:57,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:29:57,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 44 proven. 150 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:57,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 44 proven. 150 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:57,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095046977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:57,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:57,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:29:57,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [574579870] [2022-03-15 21:29:57,714 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:57,716 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:57,724 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:29:57,725 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:57,744 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9977182#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 9977181#(< i2 (* 2 N))] [2022-03-15 21:29:57,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:29:57,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:57,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:29:57,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:29:57,745 INFO L87 Difference]: Start difference. First operand 9854 states and 25615 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:29:57,928 INFO L93 Difference]: Finished difference Result 13530 states and 32935 transitions. [2022-03-15 21:29:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:29:57,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:29:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:29:57,949 INFO L225 Difference]: With dead ends: 13530 [2022-03-15 21:29:57,949 INFO L226 Difference]: Without dead ends: 13528 [2022-03-15 21:29:57,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=911, Invalid=1345, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:29:57,950 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 124 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:29:57,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:29:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13528 states. [2022-03-15 21:29:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13528 to 9948. [2022-03-15 21:29:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9948 states, 9947 states have (on average 2.6076203880567004) internal successors, (25938), 9947 states have internal predecessors, (25938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:29:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9948 states to 9948 states and 25938 transitions. [2022-03-15 21:29:58,146 INFO L78 Accepts]: Start accepts. Automaton has 9948 states and 25938 transitions. Word has length 35 [2022-03-15 21:29:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:29:58,146 INFO L470 AbstractCegarLoop]: Abstraction has 9948 states and 25938 transitions. [2022-03-15 21:29:58,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:29:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 9948 states and 25938 transitions. [2022-03-15 21:29:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:29:58,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:29:58,157 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:29:58,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Forceful destruction successful, exit code 0 [2022-03-15 21:29:58,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,535 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:58,365 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:29:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:29:58,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1710010934, now seen corresponding path program 535 times [2022-03-15 21:29:58,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:29:58,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267224920] [2022-03-15 21:29:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:29:58,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:29:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 64 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:29:58,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:29:58,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267224920] [2022-03-15 21:29:58,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267224920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:29:58,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777539045] [2022-03-15 21:29:58,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:29:58,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:29:58,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:29:58,460 INFO L229 MonitoredProcess]: Starting monitored process 536 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:29:58,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Waiting until timeout for monitored process [2022-03-15 21:29:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:29:58,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:29:58,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:29:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 69 proven. 125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:29:58,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:29:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 69 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:29:58,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777539045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:29:58,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:29:58,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 24] total 38 [2022-03-15 21:29:58,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2105604592] [2022-03-15 21:29:58,736 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:29:58,738 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:29:58,749 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 75 transitions. [2022-03-15 21:29:58,749 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:29:59,007 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 18 new interpolants: [10010872#(< i2 (* 2 N)), 10010874#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10010876#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 10010877#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 10010881#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10010889#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 10010873#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10010882#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10010879#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10010885#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 10010883#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10010888#(<= (* 2 N) (+ 6 i2)), 10010878#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10010875#(< i1 (* 2 N)), 10010887#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 10010886#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 10010884#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 10010880#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:29:59,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 21:29:59,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:29:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 21:29:59,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=2412, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:29:59,008 INFO L87 Difference]: Start difference. First operand 9948 states and 25938 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:02,387 INFO L93 Difference]: Finished difference Result 13368 states and 33018 transitions. [2022-03-15 21:30:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-03-15 21:30:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:02,409 INFO L225 Difference]: With dead ends: 13368 [2022-03-15 21:30:02,409 INFO L226 Difference]: Without dead ends: 13240 [2022-03-15 21:30:02,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20600 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8900, Invalid=44692, Unknown=0, NotChecked=0, Total=53592 [2022-03-15 21:30:02,412 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 372 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 818 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 818 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:02,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 1 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [818 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:30:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13240 states. [2022-03-15 21:30:02,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13240 to 9935. [2022-03-15 21:30:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 2.604187638413529) internal successors, (25870), 9934 states have internal predecessors, (25870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 25870 transitions. [2022-03-15 21:30:02,574 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 25870 transitions. Word has length 35 [2022-03-15 21:30:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:02,574 INFO L470 AbstractCegarLoop]: Abstraction has 9935 states and 25870 transitions. [2022-03-15 21:30:02,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 25870 transitions. [2022-03-15 21:30:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:02,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:02,584 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:02,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Ended with exit code 0 [2022-03-15 21:30:02,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,536 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:02,800 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash -736623607, now seen corresponding path program 536 times [2022-03-15 21:30:02,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:02,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612956347] [2022-03-15 21:30:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:02,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:02,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:02,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612956347] [2022-03-15 21:30:02,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612956347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:02,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242350089] [2022-03-15 21:30:02,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:02,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:02,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:02,882 INFO L229 MonitoredProcess]: Starting monitored process 537 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:02,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Waiting until timeout for monitored process [2022-03-15 21:30:02,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:02,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:02,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:30:02,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:02,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 43 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:03,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242350089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:03,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:03,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:30:03,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [275399849] [2022-03-15 21:30:03,280 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:03,282 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:03,293 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 71 transitions. [2022-03-15 21:30:03,293 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:03,489 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [10044724#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10044726#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10044723#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10044722#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10044720#(< i2 (* 2 N)), 10044721#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10044725#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 10044728#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10044727#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N)))] [2022-03-15 21:30:03,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:30:03,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:30:03,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1483, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:30:03,490 INFO L87 Difference]: Start difference. First operand 9935 states and 25870 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:07,828 INFO L93 Difference]: Finished difference Result 15187 states and 35956 transitions. [2022-03-15 21:30:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-03-15 21:30:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:07,851 INFO L225 Difference]: With dead ends: 15187 [2022-03-15 21:30:07,851 INFO L226 Difference]: Without dead ends: 15074 [2022-03-15 21:30:07,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27966 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=13262, Invalid=56698, Unknown=0, NotChecked=0, Total=69960 [2022-03-15 21:30:07,856 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 356 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:07,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 1 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:30:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15074 states. [2022-03-15 21:30:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15074 to 10181. [2022-03-15 21:30:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10181 states, 10180 states have (on average 2.613261296660118) internal successors, (26603), 10180 states have internal predecessors, (26603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10181 states to 10181 states and 26603 transitions. [2022-03-15 21:30:08,022 INFO L78 Accepts]: Start accepts. Automaton has 10181 states and 26603 transitions. Word has length 35 [2022-03-15 21:30:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:08,022 INFO L470 AbstractCegarLoop]: Abstraction has 10181 states and 26603 transitions. [2022-03-15 21:30:08,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 10181 states and 26603 transitions. [2022-03-15 21:30:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:08,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:08,032 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:08,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:08,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2022-03-15 21:30:08,248 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1085046781, now seen corresponding path program 537 times [2022-03-15 21:30:08,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:08,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854570881] [2022-03-15 21:30:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:08,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 47 proven. 147 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:08,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:08,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854570881] [2022-03-15 21:30:08,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854570881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:08,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368858310] [2022-03-15 21:30:08,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:08,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:08,311 INFO L229 MonitoredProcess]: Starting monitored process 538 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:08,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Waiting until timeout for monitored process [2022-03-15 21:30:08,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-15 21:30:08,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:08,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:30:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 47 proven. 147 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:08,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 47 proven. 147 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:08,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368858310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:08,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:08,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:30:08,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [906447966] [2022-03-15 21:30:08,644 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:08,647 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:08,655 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:30:08,655 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:08,682 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [10080955#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 10080954#(< i2 (* 2 N))] [2022-03-15 21:30:08,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:08,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:30:08,683 INFO L87 Difference]: Start difference. First operand 10181 states and 26603 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:30:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:08,911 INFO L93 Difference]: Finished difference Result 13637 states and 33411 transitions. [2022-03-15 21:30:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:30:08,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:30:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:08,933 INFO L225 Difference]: With dead ends: 13637 [2022-03-15 21:30:08,933 INFO L226 Difference]: Without dead ends: 13635 [2022-03-15 21:30:08,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=846, Invalid=1224, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:30:08,934 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 137 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:08,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13635 states. [2022-03-15 21:30:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13635 to 10265. [2022-03-15 21:30:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10265 states, 10264 states have (on average 2.6204208885424785) internal successors, (26896), 10264 states have internal predecessors, (26896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 26896 transitions. [2022-03-15 21:30:09,145 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 26896 transitions. Word has length 35 [2022-03-15 21:30:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:09,145 INFO L470 AbstractCegarLoop]: Abstraction has 10265 states and 26896 transitions. [2022-03-15 21:30:09,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:30:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 26896 transitions. [2022-03-15 21:30:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:09,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:09,155 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:09,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:09,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,538 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:09,371 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1593949892, now seen corresponding path program 538 times [2022-03-15 21:30:09,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:09,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203415336] [2022-03-15 21:30:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:09,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 66 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:09,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:09,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203415336] [2022-03-15 21:30:09,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203415336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:09,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473538554] [2022-03-15 21:30:09,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:09,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:09,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:09,500 INFO L229 MonitoredProcess]: Starting monitored process 539 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:09,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Waiting until timeout for monitored process [2022-03-15 21:30:09,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:09,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:30:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 70 proven. 124 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:30:09,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 70 proven. 125 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:30:09,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473538554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:09,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:09,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 25] total 39 [2022-03-15 21:30:09,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1490202658] [2022-03-15 21:30:09,861 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:09,864 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:09,875 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 79 transitions. [2022-03-15 21:30:09,876 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:10,316 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [10115383#(< i2 (* 2 N)), 10115395#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 10115384#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10115397#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 10115401#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 10115390#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10115385#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10115396#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 10115393#(< i1 (* 2 N)), 10115391#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10115392#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 10115387#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10115402#(<= (* 2 N) (+ 7 i2)), 10115388#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 10115389#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10115400#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10115398#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 10115386#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10115399#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 10115394#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2))] [2022-03-15 21:30:10,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 21:30:10,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 21:30:10,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:30:10,317 INFO L87 Difference]: Start difference. First operand 10265 states and 26896 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:15,116 INFO L93 Difference]: Finished difference Result 13732 states and 34028 transitions. [2022-03-15 21:30:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-03-15 21:30:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:15,140 INFO L225 Difference]: With dead ends: 13732 [2022-03-15 21:30:15,140 INFO L226 Difference]: Without dead ends: 13570 [2022-03-15 21:30:15,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22158 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9444, Invalid=48878, Unknown=0, NotChecked=0, Total=58322 [2022-03-15 21:30:15,143 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 381 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 917 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:15,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 1 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [917 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:30:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13570 states. [2022-03-15 21:30:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13570 to 10256. [2022-03-15 21:30:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10256 states, 10255 states have (on average 2.617162359824476) internal successors, (26839), 10255 states have internal predecessors, (26839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10256 states to 10256 states and 26839 transitions. [2022-03-15 21:30:15,306 INFO L78 Accepts]: Start accepts. Automaton has 10256 states and 26839 transitions. Word has length 35 [2022-03-15 21:30:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:15,307 INFO L470 AbstractCegarLoop]: Abstraction has 10256 states and 26839 transitions. [2022-03-15 21:30:15,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10256 states and 26839 transitions. [2022-03-15 21:30:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:15,318 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:15,318 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:15,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:15,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2022-03-15 21:30:15,534 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:15,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2091171047, now seen corresponding path program 539 times [2022-03-15 21:30:15,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:15,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294593207] [2022-03-15 21:30:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 46 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:15,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:15,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294593207] [2022-03-15 21:30:15,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294593207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:15,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661099813] [2022-03-15 21:30:15,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:15,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:15,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:15,596 INFO L229 MonitoredProcess]: Starting monitored process 540 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:15,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Waiting until timeout for monitored process [2022-03-15 21:30:15,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-15 21:30:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:15,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:30:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 46 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:15,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 46 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:15,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661099813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:15,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:15,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:30:15,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1428208795] [2022-03-15 21:30:15,889 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:15,891 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:15,903 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 75 transitions. [2022-03-15 21:30:15,903 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:16,098 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [10150256#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10150254#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10150262#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 10150259#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10150258#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 10150260#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10150257#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10150253#(< i2 (* 2 N)), 10150255#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10150261#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N)))] [2022-03-15 21:30:16,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:30:16,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:16,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:30:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=1575, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:30:16,099 INFO L87 Difference]: Start difference. First operand 10256 states and 26839 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:22,584 INFO L93 Difference]: Finished difference Result 16548 states and 39110 transitions. [2022-03-15 21:30:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2022-03-15 21:30:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:22,612 INFO L225 Difference]: With dead ends: 16548 [2022-03-15 21:30:22,612 INFO L226 Difference]: Without dead ends: 16411 [2022-03-15 21:30:22,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53226 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=18927, Invalid=107453, Unknown=0, NotChecked=0, Total=126380 [2022-03-15 21:30:22,624 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 506 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:22,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:30:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16411 states. [2022-03-15 21:30:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16411 to 10505. [2022-03-15 21:30:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10504 states have (on average 2.6238575780654987) internal successors, (27561), 10504 states have internal predecessors, (27561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 27561 transitions. [2022-03-15 21:30:22,840 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 27561 transitions. Word has length 35 [2022-03-15 21:30:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:22,840 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 27561 transitions. [2022-03-15 21:30:22,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 27561 transitions. [2022-03-15 21:30:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:22,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:22,851 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:22,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:23,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 540 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2022-03-15 21:30:23,065 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1340844413, now seen corresponding path program 540 times [2022-03-15 21:30:23,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:23,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666060589] [2022-03-15 21:30:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:23,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:23,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:23,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666060589] [2022-03-15 21:30:23,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666060589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:23,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070112678] [2022-03-15 21:30:23,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:30:23,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:23,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:23,150 INFO L229 MonitoredProcess]: Starting monitored process 541 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:23,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Waiting until timeout for monitored process [2022-03-15 21:30:23,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 21:30:23,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:23,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:30:23,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:23,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:23,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070112678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:23,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:23,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:30:23,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1292519666] [2022-03-15 21:30:23,501 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:23,503 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:23,512 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:30:23,512 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:23,538 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [10188677#(< i2 (* 2 N)), 10188678#(or (< i2 (* 2 N)) (< i1 (* 2 N)))] [2022-03-15 21:30:23,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:23,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:30:23,539 INFO L87 Difference]: Start difference. First operand 10505 states and 27561 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:30:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:23,747 INFO L93 Difference]: Finished difference Result 13577 states and 33495 transitions. [2022-03-15 21:30:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:30:23,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:30:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:23,770 INFO L225 Difference]: With dead ends: 13577 [2022-03-15 21:30:23,770 INFO L226 Difference]: Without dead ends: 13575 [2022-03-15 21:30:23,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=779, Invalid=1113, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:30:23,771 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 115 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:23,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13575 states. [2022-03-15 21:30:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13575 to 10579. [2022-03-15 21:30:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10579 states, 10578 states have (on average 2.630364908300246) internal successors, (27824), 10578 states have internal predecessors, (27824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10579 states to 10579 states and 27824 transitions. [2022-03-15 21:30:23,939 INFO L78 Accepts]: Start accepts. Automaton has 10579 states and 27824 transitions. Word has length 35 [2022-03-15 21:30:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:23,939 INFO L470 AbstractCegarLoop]: Abstraction has 10579 states and 27824 transitions. [2022-03-15 21:30:23,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:30:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 10579 states and 27824 transitions. [2022-03-15 21:30:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:23,950 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:23,950 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:23,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Ended with exit code 0 [2022-03-15 21:30:24,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542,541 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:24,166 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:24,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:24,166 INFO L85 PathProgramCache]: Analyzing trace with hash 937520394, now seen corresponding path program 541 times [2022-03-15 21:30:24,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:24,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113872830] [2022-03-15 21:30:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:24,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 70 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:24,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:24,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113872830] [2022-03-15 21:30:24,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113872830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:24,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966567302] [2022-03-15 21:30:24,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:30:24,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:24,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:24,335 INFO L229 MonitoredProcess]: Starting monitored process 542 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:24,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Waiting until timeout for monitored process [2022-03-15 21:30:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:30:24,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 73 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:30:24,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 73 proven. 122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:30:24,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966567302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:24,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:24,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 25] total 39 [2022-03-15 21:30:24,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [701612365] [2022-03-15 21:30:24,707 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:24,709 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:24,721 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 83 transitions. [2022-03-15 21:30:24,721 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:25,277 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 22 new interpolants: [10223675#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 10223689#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 10223686#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 10223685#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 10223687#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 10223684#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 10223674#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10223676#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10223683#(< i1 (* 2 N)), 10223677#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10223690#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10223682#(<= (* 2 N) (+ i2 8)), 10223671#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10223678#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10223670#(< i2 (* 2 N)), 10223673#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10223681#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 10223688#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 10223679#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 10223672#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10223691#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 10223680#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N)))] [2022-03-15 21:30:25,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 21:30:25,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 21:30:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=2935, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:30:25,278 INFO L87 Difference]: Start difference. First operand 10579 states and 27824 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:31,378 INFO L93 Difference]: Finished difference Result 14957 states and 37172 transitions. [2022-03-15 21:30:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2022-03-15 21:30:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:31,403 INFO L225 Difference]: With dead ends: 14957 [2022-03-15 21:30:31,404 INFO L226 Difference]: Without dead ends: 14713 [2022-03-15 21:30:31,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34475 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13208, Invalid=74704, Unknown=0, NotChecked=0, Total=87912 [2022-03-15 21:30:31,411 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 580 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 1364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1364 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:31,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 1 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1364 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:30:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14713 states. [2022-03-15 21:30:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14713 to 10572. [2022-03-15 21:30:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10572 states, 10571 states have (on average 2.6270929902563616) internal successors, (27771), 10571 states have internal predecessors, (27771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10572 states to 10572 states and 27771 transitions. [2022-03-15 21:30:31,593 INFO L78 Accepts]: Start accepts. Automaton has 10572 states and 27771 transitions. Word has length 35 [2022-03-15 21:30:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:31,593 INFO L470 AbstractCegarLoop]: Abstraction has 10572 states and 27771 transitions. [2022-03-15 21:30:31,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 10572 states and 27771 transitions. [2022-03-15 21:30:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:31,643 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:31,643 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:31,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Ended with exit code 0 [2022-03-15 21:30:31,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2022-03-15 21:30:31,843 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:31,843 INFO L85 PathProgramCache]: Analyzing trace with hash -441507895, now seen corresponding path program 542 times [2022-03-15 21:30:31,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:31,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147484587] [2022-03-15 21:30:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:31,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 51 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:31,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:31,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147484587] [2022-03-15 21:30:31,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147484587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:31,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963320716] [2022-03-15 21:30:31,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:30:31,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:31,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:31,929 INFO L229 MonitoredProcess]: Starting monitored process 543 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:31,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Waiting until timeout for monitored process [2022-03-15 21:30:31,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:30:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:30:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 51 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:32,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 51 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:32,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963320716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:32,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:32,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:30:32,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [485628746] [2022-03-15 21:30:32,296 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:32,298 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:32,310 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 79 transitions. [2022-03-15 21:30:32,310 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:32,593 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [10260505#(< i2 (* 2 N)), 10260506#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10260507#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10260510#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 10260512#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10260511#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10260513#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10260508#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10260515#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 10260509#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10260514#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8)))] [2022-03-15 21:30:32,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:30:32,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:30:32,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=1669, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:30:32,594 INFO L87 Difference]: Start difference. First operand 10572 states and 27771 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:41,261 INFO L93 Difference]: Finished difference Result 17547 states and 41223 transitions. [2022-03-15 21:30:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 360 states. [2022-03-15 21:30:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:41,292 INFO L225 Difference]: With dead ends: 17547 [2022-03-15 21:30:41,293 INFO L226 Difference]: Without dead ends: 17384 [2022-03-15 21:30:41,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65029 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21168, Invalid=132104, Unknown=0, NotChecked=0, Total=153272 [2022-03-15 21:30:41,301 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 604 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:41,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 1 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:30:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17384 states. [2022-03-15 21:30:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17384 to 10828. [2022-03-15 21:30:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10828 states, 10827 states have (on average 2.632862288722638) internal successors, (28506), 10827 states have internal predecessors, (28506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10828 states to 10828 states and 28506 transitions. [2022-03-15 21:30:41,503 INFO L78 Accepts]: Start accepts. Automaton has 10828 states and 28506 transitions. Word has length 35 [2022-03-15 21:30:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:41,503 INFO L470 AbstractCegarLoop]: Abstraction has 10828 states and 28506 transitions. [2022-03-15 21:30:41,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 10828 states and 28506 transitions. [2022-03-15 21:30:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:41,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:41,514 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:41,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:41,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2022-03-15 21:30:41,731 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash -680636413, now seen corresponding path program 543 times [2022-03-15 21:30:41,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:41,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326925150] [2022-03-15 21:30:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:41,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 59 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:41,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:41,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326925150] [2022-03-15 21:30:41,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326925150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:41,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5719168] [2022-03-15 21:30:41,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:30:41,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:41,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:41,797 INFO L229 MonitoredProcess]: Starting monitored process 544 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:41,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Waiting until timeout for monitored process [2022-03-15 21:30:41,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:30:41,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:41,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:30:41,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 59 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:41,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 59 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:42,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5719168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:42,159 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:42,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:30:42,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1398923543] [2022-03-15 21:30:42,159 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:42,162 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:42,170 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:30:42,170 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:42,207 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [10300646#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 10300645#(< i2 (* 2 N))] [2022-03-15 21:30:42,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:30:42,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:42,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:30:42,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:30:42,208 INFO L87 Difference]: Start difference. First operand 10828 states and 28506 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:30:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:42,429 INFO L93 Difference]: Finished difference Result 13336 states and 33196 transitions. [2022-03-15 21:30:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:30:42,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:30:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:42,453 INFO L225 Difference]: With dead ends: 13336 [2022-03-15 21:30:42,453 INFO L226 Difference]: Without dead ends: 13334 [2022-03-15 21:30:42,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=710, Invalid=1012, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:30:42,454 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 112 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:42,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:30:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2022-03-15 21:30:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 10892. [2022-03-15 21:30:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10892 states, 10891 states have (on average 2.6387843173262326) internal successors, (28739), 10891 states have internal predecessors, (28739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10892 states to 10892 states and 28739 transitions. [2022-03-15 21:30:42,660 INFO L78 Accepts]: Start accepts. Automaton has 10892 states and 28739 transitions. Word has length 35 [2022-03-15 21:30:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:42,661 INFO L470 AbstractCegarLoop]: Abstraction has 10892 states and 28739 transitions. [2022-03-15 21:30:42,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:30:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 10892 states and 28739 transitions. [2022-03-15 21:30:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:42,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:42,672 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:42,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Forceful destruction successful, exit code 0 [2022-03-15 21:30:42,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2022-03-15 21:30:42,888 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2063042436, now seen corresponding path program 544 times [2022-03-15 21:30:42,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:42,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565449649] [2022-03-15 21:30:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:42,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 76 proven. 120 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:30:43,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:43,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565449649] [2022-03-15 21:30:43,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565449649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:43,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283974403] [2022-03-15 21:30:43,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:30:43,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:43,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:43,068 INFO L229 MonitoredProcess]: Starting monitored process 545 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:43,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Waiting until timeout for monitored process [2022-03-15 21:30:43,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:30:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:30:43,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 78 proven. 116 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:30:43,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 78 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:30:43,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283974403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:43,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:43,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 26] total 40 [2022-03-15 21:30:43,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [413797603] [2022-03-15 21:30:43,441 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:43,443 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:43,455 INFO L252 McrAutomatonBuilder]: Finished intersection with 62 states and 87 transitions. [2022-03-15 21:30:43,455 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:44,081 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 24 new interpolants: [10336035#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10336042#(<= (* 2 N) (+ 9 i2)), 10336027#(< i2 (* 2 N)), 10336030#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10336036#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 10336028#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10336037#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 10336021#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 10336043#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 7 i2))), 10336026#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N))), 10336024#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 10336040#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10336029#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10336034#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10336023#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 10336025#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 10336039#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11))), 10336038#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 10336020#(< i1 (* 2 N)), 10336022#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 10336041#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 10336033#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10336031#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10336032#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N)))] [2022-03-15 21:30:44,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 21:30:44,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 21:30:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=3259, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:30:44,082 INFO L87 Difference]: Start difference. First operand 10892 states and 28739 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:30:51,421 INFO L93 Difference]: Finished difference Result 15365 states and 38209 transitions. [2022-03-15 21:30:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-03-15 21:30:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:30:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:30:51,446 INFO L225 Difference]: With dead ends: 15365 [2022-03-15 21:30:51,446 INFO L226 Difference]: Without dead ends: 15063 [2022-03-15 21:30:51,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36388 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=13800, Invalid=80142, Unknown=0, NotChecked=0, Total=93942 [2022-03-15 21:30:51,450 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 681 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 1597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1597 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:30:51,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1597 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:30:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15063 states. [2022-03-15 21:30:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15063 to 10889. [2022-03-15 21:30:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10889 states, 10888 states have (on average 2.6356539309331373) internal successors, (28697), 10888 states have internal predecessors, (28697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10889 states to 10889 states and 28697 transitions. [2022-03-15 21:30:51,631 INFO L78 Accepts]: Start accepts. Automaton has 10889 states and 28697 transitions. Word has length 35 [2022-03-15 21:30:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:30:51,631 INFO L470 AbstractCegarLoop]: Abstraction has 10889 states and 28697 transitions. [2022-03-15 21:30:51,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 48 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:30:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 10889 states and 28697 transitions. [2022-03-15 21:30:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:30:51,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:30:51,642 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:30:51,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Ended with exit code 0 [2022-03-15 21:30:51,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2022-03-15 21:30:51,858 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:30:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:30:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1645143769, now seen corresponding path program 545 times [2022-03-15 21:30:51,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:30:51,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366817942] [2022-03-15 21:30:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:30:51,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:30:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:30:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:51,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:30:51,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366817942] [2022-03-15 21:30:51,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366817942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:30:51,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812563655] [2022-03-15 21:30:51,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:30:51,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:30:51,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:30:51,940 INFO L229 MonitoredProcess]: Starting monitored process 546 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:30:51,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Waiting until timeout for monitored process [2022-03-15 21:30:51,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:30:51,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:30:51,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:30:51,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:30:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:30:52,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:30:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:30:52,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812563655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:30:52,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:30:52,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:30:52,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1234756481] [2022-03-15 21:30:52,322 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:30:52,325 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:30:52,337 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 83 transitions. [2022-03-15 21:30:52,337 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:30:52,718 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [10373915#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10373918#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 10373923#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 10373917#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10373919#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10373924#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 10373920#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10373922#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 10373916#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10373914#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10373921#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10373913#(< i2 (* 2 N))] [2022-03-15 21:30:52,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:30:52,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:30:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:30:52,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=1765, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:30:52,719 INFO L87 Difference]: Start difference. First operand 10889 states and 28697 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:08,076 INFO L93 Difference]: Finished difference Result 20430 states and 47215 transitions. [2022-03-15 21:31:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 522 states. [2022-03-15 21:31:08,077 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:31:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:08,108 INFO L225 Difference]: With dead ends: 20430 [2022-03-15 21:31:08,108 INFO L226 Difference]: Without dead ends: 20239 [2022-03-15 21:31:08,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137604 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=35559, Invalid=271911, Unknown=0, NotChecked=0, Total=307470 [2022-03-15 21:31:08,117 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 814 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:08,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 1 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:31:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20239 states. [2022-03-15 21:31:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20239 to 11148. [2022-03-15 21:31:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11148 states, 11147 states have (on average 2.6391854310576837) internal successors, (29419), 11147 states have internal predecessors, (29419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 29419 transitions. [2022-03-15 21:31:08,320 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 29419 transitions. Word has length 35 [2022-03-15 21:31:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:08,320 INFO L470 AbstractCegarLoop]: Abstraction has 11148 states and 29419 transitions. [2022-03-15 21:31:08,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 29419 transitions. [2022-03-15 21:31:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:31:08,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:08,331 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:08,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Ended with exit code 0 [2022-03-15 21:31:08,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2022-03-15 21:31:08,536 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1689024893, now seen corresponding path program 546 times [2022-03-15 21:31:08,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:08,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510718791] [2022-03-15 21:31:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:08,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 68 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:31:08,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:08,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510718791] [2022-03-15 21:31:08,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510718791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:08,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489809207] [2022-03-15 21:31:08,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:31:08,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:08,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:08,604 INFO L229 MonitoredProcess]: Starting monitored process 547 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:08,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Waiting until timeout for monitored process [2022-03-15 21:31:08,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:31:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:31:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 68 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:31:08,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 68 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:31:08,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489809207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:08,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:08,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 22] total 35 [2022-03-15 21:31:08,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1894146815] [2022-03-15 21:31:08,907 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:08,909 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:08,918 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2022-03-15 21:31:08,918 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:08,937 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [10417902#(or (< i2 (* 2 N)) (< i1 (* 2 N))), 10417901#(< i2 (* 2 N))] [2022-03-15 21:31:08,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:31:08,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:31:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:31:08,938 INFO L87 Difference]: Start difference. First operand 11148 states and 29419 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) 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 21:31:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:09,091 INFO L93 Difference]: Finished difference Result 12904 states and 32425 transitions. [2022-03-15 21:31:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:31:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 35 [2022-03-15 21:31:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:09,111 INFO L225 Difference]: With dead ends: 12904 [2022-03-15 21:31:09,111 INFO L226 Difference]: Without dead ends: 12902 [2022-03-15 21:31:09,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=639, Invalid=921, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:31:09,112 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 113 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:09,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:31:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12902 states. [2022-03-15 21:31:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12902 to 11192. [2022-03-15 21:31:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11192 states, 11191 states have (on average 2.643820927531052) internal successors, (29587), 11191 states have internal predecessors, (29587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11192 states to 11192 states and 29587 transitions. [2022-03-15 21:31:09,272 INFO L78 Accepts]: Start accepts. Automaton has 11192 states and 29587 transitions. Word has length 35 [2022-03-15 21:31:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:09,272 INFO L470 AbstractCegarLoop]: Abstraction has 11192 states and 29587 transitions. [2022-03-15 21:31:09,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) 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 21:31:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 11192 states and 29587 transitions. [2022-03-15 21:31:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:31:09,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:09,284 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:09,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:09,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,547 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:09,499 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:09,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1700479926, now seen corresponding path program 547 times [2022-03-15 21:31:09,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:09,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176068697] [2022-03-15 21:31:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:09,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 84 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:31:09,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:09,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176068697] [2022-03-15 21:31:09,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176068697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:09,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902907300] [2022-03-15 21:31:09,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:31:09,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:09,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:09,662 INFO L229 MonitoredProcess]: Starting monitored process 548 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:09,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Waiting until timeout for monitored process [2022-03-15 21:31:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:31:09,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 85 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 21:31:09,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 85 proven. 110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:31:10,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902907300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:10,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:10,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 26] total 40 [2022-03-15 21:31:10,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [581485400] [2022-03-15 21:31:10,110 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:10,113 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:10,125 INFO L252 McrAutomatonBuilder]: Finished intersection with 64 states and 91 transitions. [2022-03-15 21:31:10,125 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:10,715 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 26 new interpolants: [10453458#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 10453449#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10453453#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10453441#(or (< i1 (* 2 N)) (<= (+ (* 2 N) 1) i2)), 10453455#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10453463#(or (< i1 (* 2 N)) (<= (* 2 N) (+ i2 8))), 10453440#(< i1 (* 2 N)), 10453447#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10453448#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10453443#(or (<= (* 2 N) (+ i2 1)) (< i1 (* 2 N))), 10453444#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 2 i2))), 10453454#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 6 i2))), 10453446#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10453445#(< i2 (* 2 N)), 10453450#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 10453465#(<= (* 2 N) (+ i2 10)), 10453461#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11))), 10453442#(or (< i1 (* 2 N)) (<= (* 2 N) i2)), 10453451#(or (<= (* 2 N) (+ 3 i2)) (< i1 (* 2 N))), 10453457#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10453459#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N))), 10453464#(or (<= (* 2 N) (+ i2 12)) (< (+ i2 13) (* 2 N))), 10453460#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 10453456#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10453462#(or (< i1 (* 2 N)) (<= (* 2 N) (+ 7 i2))), 10453452#(or (<= (* 2 N) (+ i2 4)) (< i1 (* 2 N)))] [2022-03-15 21:31:10,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-15 21:31:10,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-15 21:31:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=3503, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:31:10,716 INFO L87 Difference]: Start difference. First operand 11192 states and 29587 transitions. Second operand has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 51 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:31:19,393 INFO L93 Difference]: Finished difference Result 17639 states and 43681 transitions. [2022-03-15 21:31:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2022-03-15 21:31:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 51 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 21:31:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:31:19,420 INFO L225 Difference]: With dead ends: 17639 [2022-03-15 21:31:19,421 INFO L226 Difference]: Without dead ends: 17273 [2022-03-15 21:31:19,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49291 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=17726, Invalid=107236, Unknown=0, NotChecked=0, Total=124962 [2022-03-15 21:31:19,428 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 827 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 1963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1963 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:19,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1963 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:31:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17273 states. [2022-03-15 21:31:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17273 to 11112. [2022-03-15 21:31:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11112 states, 11111 states have (on average 2.6360363603636037) internal successors, (29289), 11111 states have internal predecessors, (29289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11112 states to 11112 states and 29289 transitions. [2022-03-15 21:31:19,619 INFO L78 Accepts]: Start accepts. Automaton has 11112 states and 29289 transitions. Word has length 35 [2022-03-15 21:31:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:31:19,619 INFO L470 AbstractCegarLoop]: Abstraction has 11112 states and 29289 transitions. [2022-03-15 21:31:19,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 51 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:31:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 11112 states and 29289 transitions. [2022-03-15 21:31:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 21:31:19,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:31:19,630 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:31:19,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Ended with exit code 0 [2022-03-15 21:31:19,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,548 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:19,845 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:31:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:31:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash -303150199, now seen corresponding path program 548 times [2022-03-15 21:31:19,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:31:19,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745082730] [2022-03-15 21:31:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:31:19,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:31:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:31:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 67 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:19,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:31:19,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745082730] [2022-03-15 21:31:19,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745082730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:31:19,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839612892] [2022-03-15 21:31:19,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:31:19,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:31:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:31:19,915 INFO L229 MonitoredProcess]: Starting monitored process 549 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:31:19,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Waiting until timeout for monitored process [2022-03-15 21:31:19,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:31:19,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:31:19,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:31:19,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:31:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 67 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:31:19,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:31:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 67 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:31:20,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839612892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:31:20,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:31:20,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 23] total 37 [2022-03-15 21:31:20,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1684686182] [2022-03-15 21:31:20,236 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:31:20,239 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:31:20,301 INFO L252 McrAutomatonBuilder]: Finished intersection with 62 states and 87 transitions. [2022-03-15 21:31:20,301 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:31:20,557 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [10494148#(or (<= (* 2 N) (+ 2 i2)) (< (+ 3 i2) (* 2 N))), 10494156#(or (<= (* 2 N) (+ i2 10)) (< (+ i2 11) (* 2 N))), 10494151#(or (< (+ 6 i2) (* 2 N)) (<= (* 2 N) (+ 5 i2))), 10494145#(< i2 (* 2 N)), 10494157#(or (< (+ i2 12) (* 2 N)) (<= (* 2 N) (+ i2 11))), 10494150#(or (<= (* 2 N) (+ i2 4)) (< (+ 5 i2) (* 2 N))), 10494147#(or (<= (* 2 N) (+ i2 1)) (< (+ 2 i2) (* 2 N))), 10494149#(or (< (+ i2 4) (* 2 N)) (<= (* 2 N) (+ 3 i2))), 10494154#(or (< (+ 9 i2) (* 2 N)) (<= (* 2 N) (+ i2 8))), 10494146#(or (< (+ i2 1) (* 2 N)) (<= (* 2 N) i2)), 10494152#(or (<= (* 2 N) (+ 6 i2)) (< (+ 7 i2) (* 2 N))), 10494153#(or (<= (* 2 N) (+ 7 i2)) (< (+ i2 8) (* 2 N))), 10494155#(or (<= (* 2 N) (+ 9 i2)) (< (+ i2 10) (* 2 N)))] [2022-03-15 21:31:20,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:31:20,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:31:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:31:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=1863, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:31:20,558 INFO L87 Difference]: Start difference. First operand 11112 states and 29289 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-15 21:31:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 498 states. [2022-03-15 21:31:33,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 530 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124740 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=29623, Invalid=252869, Unknown=0, NotChecked=0, Total=282492 [2022-03-15 21:31:33,364 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 701 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:31:33,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 1 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:31:33,364 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 21:31:33,379 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 21:31:33,379 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 21:31:33,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Forceful destruction successful, exit code 0 [2022-03-15 21:31:33,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable550 [2022-03-15 21:31:33,580 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (11112states) and FLOYD_HOARE automaton (currently 498 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (7604 states constructed, input type IntersectNwa). [2022-03-15 21:31:33,581 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 21:31:33,582 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 21:31:33,583 INFO L732 BasicCegarLoop]: Path program histogram: [548, 1, 1, 1] [2022-03-15 21:31:33,584 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 21:31:33,584 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 21:31:33,585 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 09:31:33 BasicIcfg [2022-03-15 21:31:33,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 21:31:33,586 INFO L158 Benchmark]: Toolchain (without parser) took 944730.65ms. Allocated memory was 203.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 163.6MB in the beginning and 376.5MB in the end (delta: -212.9MB). Peak memory consumption was 851.8MB. Max. memory is 8.0GB. [2022-03-15 21:31:33,586 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 203.4MB. Free memory is still 164.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:31:33,586 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.18ms. Allocated memory is still 203.4MB. Free memory was 163.5MB in the beginning and 161.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:31:33,586 INFO L158 Benchmark]: Boogie Preprocessor took 14.04ms. Allocated memory is still 203.4MB. Free memory was 161.9MB in the beginning and 161.1MB in the end (delta: 891.1kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 21:31:33,586 INFO L158 Benchmark]: RCFGBuilder took 167.70ms. Allocated memory is still 203.4MB. Free memory was 160.9MB in the beginning and 152.3MB in the end (delta: 8.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 21:31:33,586 INFO L158 Benchmark]: TraceAbstraction took 944526.87ms. Allocated memory was 203.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 151.7MB in the beginning and 376.5MB in the end (delta: -224.7MB). Peak memory consumption was 840.3MB. Max. memory is 8.0GB. [2022-03-15 21:31:33,586 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09ms. Allocated memory is still 203.4MB. Free memory is still 164.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.18ms. Allocated memory is still 203.4MB. Free memory was 163.5MB in the beginning and 161.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 14.04ms. Allocated memory is still 203.4MB. Free memory was 161.9MB in the beginning and 161.1MB in the end (delta: 891.1kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 167.70ms. Allocated memory is still 203.4MB. Free memory was 160.9MB in the beginning and 152.3MB in the end (delta: 8.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 944526.87ms. Allocated memory was 203.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 151.7MB in the beginning and 376.5MB in the end (delta: -224.7MB). Peak memory consumption was 840.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.6s, 32 PlacesBefore, 18 PlacesAfterwards, 29 TransitionsBefore, 13 TransitionsAfterwards, 198 CoEnabledTransitionPairs, 3 FixpointIterations, 3 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 21 TotalNumberOfCompositions, 222 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 200, positive: 194, positive conditional: 0, positive unconditional: 194, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 106, positive: 102, positive conditional: 0, positive unconditional: 102, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 200, positive: 92, positive conditional: 0, positive unconditional: 92, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 106, unknown conditional: 0, unknown unconditional: 106] , Statistics on independence cache: Total cache size (in pairs): 5, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (11112states) and FLOYD_HOARE automaton (currently 498 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (7604 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (11112states) and FLOYD_HOARE automaton (currently 498 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (7604 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (11112states) and FLOYD_HOARE automaton (currently 498 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (7604 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 44 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 944.5s, OverallIterations: 551, TraceHistogramMax: 15, PathProgramHistogramMax: 548, EmptinessCheckTime: 3.4s, AutomataDifference: 512.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.7s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 96850 SdHoareTripleChecker+Valid, 92.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96850 mSDsluCounter, 551 SdHoareTripleChecker+Invalid, 79.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 60186 mSDsCounter, 68643 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 201656 IncrementalHoareTripleChecker+Invalid, 270299 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68643 mSolverCounterUnsat, 551 mSDtfsCounter, 201656 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72566 GetRequests, 25638 SyntacticMatches, 2611 SemanticMatches, 44317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2689623 ImplicationChecksByTransitivity, 507.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11296occurred in iteration=432, InterpolantAutomatonStates: 31554, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 50.1s AutomataMinimizationTime, 550 MinimizatonAttempts, 1128033 StatesRemovedByMinimization, 549 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.5s SsaConstructionTime, 7.5s SatisfiabilityAnalysisTime, 169.6s InterpolantComputationTime, 29930 NumberOfCodeBlocks, 29829 NumberOfCodeBlocksAsserted, 3057 NumberOfCheckSat, 43235 ConstructedInterpolants, 0 QuantifiedInterpolants, 289551 SizeOfPredicates, 2592 NumberOfNonLiveVariables, 44005 ConjunctsInSsa, 12217 ConjunctsInUnsatCore, 1647 InterpolantComputations, 3 PerfectInterpolantSequences, 88999/183143 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